SITE 859 HOLE A CORE 1H CORED mbsf 59A-1H! 1 II 1 1 II. Graphic Lith. Section Age. Disturb. Sample. Meter. Color. Description.

Transcription

1 TE 859 HOLE A CORE H CORED mbsf 59A-H! ection 5 :.0;!!!!!! CC Quaternary o 73 CO 2 5GY 3/2 LTY CLAY TO CLAYEY LT WTH DATOM ection and core catcher contain structureless grayish olive green (5GY 3/2) LTY CLAY TO CLAYEY LT WTH DATOM. Minor Lithology: The uppermost two centimeters of the core consist of soupy, dusky yellow green (5GY 5/2) CLAYEY LT WTH RADOLARAN. nformation on Core Forms, for ALL sites, represents field notes taken aboard ship. ome of this information has been refined in accord with postcruise findings, but production schedules prohibit definitive correlation of these forms with subsequent findings. Thus, the reader should be alerted to the occasional ambiguity or discrepancy.

2 TE 859 HOLE /\ CORE 2h].0: ~ y - i ' " " ~" Tin" il i " ^~ ^~ ^~ - ih, " ^~ ^~ ^~ il " "~ ^ - i - l ~ ^ ji_"i_~i_"i_ ~ l : i Z~LZ~LZ~LZ"! - i ~ 2 : i, 7ZZZ ~-"[ 2 l j "JT-T-T. 'J J2.-^.-3_ - i ~"""" " 5 J i "" "" "~' - i i j ~-r^r^~. ~Z i "j ~ i J ^ _K ^H hl - ^ ^ ^ k " ^~ ^~ ^~ ii 6 Z i ~ iik " "~" "^ ~" ; iik " ^~ ^~ ^~ i i j- rz"i!"_ L jfiii ^~ ^ ^ A *T i πsuzs ection _ ik " ^~ ^ ^~ o.s :, k " ^~ ^~ ^~ i i k " "^ ^~ """ o d. : ' ii ~ i l - l - l 3 7 "TLim."!." CC 03 c leiε8 0. Φ Q. -^- > -^ i i q o b W s M 5GY 5/2 To 5GY 3/2 0GY 5/2 5GY 3/2 CORED mbsf LTY CLAY TO CLAYEY LT WTH RADOLARAN AND DATOM The core consists predominantly of mottled dusky yellow green (5GY 5/2) to grayish olive green (5GY 3/2 )LTY CLAY TO CLAYEY LT WTH RADOLARAN AND DATOM. n ections 2, 3, and 4 are laminae and concentrations of black (N) CLAYEY LT. Black (N) CLAYEY LT also occurs as isolated circular concentrations in ections 3, cm and 4, cm and cm. Minor Lithologies: ntervals of grayish olive green (5GY 3/2) LTY CLAY occur in ection 2, cm; ection 7, 0-5 cm and the core catcher, 0-22 cm. One bed of grayish green (0GY 5/2) NANNOFOL LTY CLAY occurs in ections 5 and 6 Two concentrations of bioclastic debris occur in ection 6, cm and cm. These bioclasts include foraminifers and echinoid spines. General : "Bedding" consists of inclined layers that are defined by laminae and concentrations of dark silt, closely associated with recumbent isoclinal fold noses, in ections 2, 3, and 4.

3 TE 859 HOLE <\ CORE 3H ; 0.5J._T_"_"_" :.0; ~- - J - - "_r"_r"_r"_r". _r"_z~_z"_r". ection 2."i_"i_i."i. 3 ^ ~~ ~ ^ ~ -.T-~Z "_" 4 -~_"_"_"Z_" ~.i_in_"i_" "_r"_r_r"_ri pp - "_r jr_r_r. Φ Φ g!ld & ddn '\}> -<> s s 0 s M 4/ To 2/ CORED mbsf CLAYEY LT TO LTY CLAY The core consists of olive green ( 4/) to olive black ( 2/) CLAYEY LT TO LTY CLAY. The contact at ection 3,35 cm is the base of sections containing sparse, steeply dipping, thin laminations of brownish black (R 2/) CLAYEY LT. Minor Lithology: A bed of brownish black (R 2/) VERY FNE LTY AND occurs in ection 2, cm. General : Deformed intervals occur at: ection, 24-2 cm; ection 2, cm; ection 3, cm; and throughout ection 4 and the core catcher. The contact at ection 3,35 cm may be a tectonic contact juxtaposing an interval containing sparse steeply dipping thin laminations onto a largely structureless and horizontal interval. Between ection 4, 60 cm and CC, 25 cm, brown silty veins are parallel to the core sides. 859A-3H

4 TE 859 HOLE A CORE 4H CORED mbsf j 0.5; Z-E z zj izirir -Z"..0; rzj!"zl"zj."z "Z_"Z_" -T_"Z_"Z_"Z_" - "_z"_inz"_z"_ 2 _Z"_Z"_Z"_Z". 2 rzrzrere!" j"z»rz_rzj"z_r - rzj^rzuzir 2 ^TLZ^ZTZTL - - ; ^ ^ ~- hll ~~ ~ ~ ~ * ~ ~ ~ nnnrzs nnszszs."z_"z_"z_"z_" Jü"ü~E~Er."Z_"Z_"Z_"ZJ _Z"_Z"_Z"_Z". ectionj Φ 3 4 Pli< W 2/ To 5G 2/ LTY CLAY less olive black ( 2/) to greenish black (5G 2/) LTY CLAY. General : picules occur in section. Lower portions of the core contain a few diatoms and spicules. mall black (N) silty concretion occurs in ection 2, 7-8 cm. mall (0.5 cm) concretion of brownish (0YR 5/4) fragmentary carbonate in ection 2, cm. Thin vertical joint containing fragmentary carbonate in ection 2,24-3 cm. jü-zjü-i? " ^ "" "~ ~" 5 - "UT""""""" rzhjijü- é fo~ so B5- O 35 too."z_"z_"z_"z_" 6.ijr_"z_"z_" -Z"_z"_z"_r. CC ^ZnZTLZ~LZ~L M O 0 us eo K

5 TE 859 HOLE A CORE 5H CORED mbsf 859A-5H LTY CLAY TO CLAYEY LT 5GY 4/ Core consists of grayish olive green (5GY 3/2) LTY CLAY and olive gray ( 3/2) CLAYEY LT. Minor Lithologies: Core has thin interbeds and patches of grayish olive green (5GY3/2) CLAYEY LT, light olive gray (0Y4/2) CLAYEY LT with nannofossils, olive gray (3/2) LTY AND, and dispersed spots of white (N2) PCULTE. Void 3/2 General : The interval from ection, 33 cm to ection 4, 80 cm, is disturbed with isolated inclined interbeds and fold noses of probable slump origin. Near-vertical sandy veins (or fragments of beds?) of possible clastic dike origin occur in ection 4, cm; ection 5,00-20; and ection 6, cm.

6 TE 859 HOLE \ CORE 6 CORED mbsf 859A6 ection 5 :.0; < > ' M >!!!!!!!!!!!!! ' M > > 2 CC upper P ocene o! W i 3/2 LTY CLAY TO CLAYEY LT ections and 2 consist dominantly of olive gray ( 3/2) structureless LTY CLAY. ection CC consists of grayish olive green CLAYEY LT. Minor Lithologies: A few pods and one interbed of silty sand occur in ection (95-5 cm). ections 2 and CC contain dispersed clots of greenish gray (5GY 6/) calcareous silt with small concretions. TE 859 HOLE A CORE 7 CORED mbsf ection 5 : ee uplio www V 3/2 CLAYEY LT Core consists of structureless olive gray ( 3/2) CLAYEY LT.

7 TE 859 HOLE \ CORE 8 CORED mbsf 859A-8 ection 0.5j.0;! ilihhhhhhh! CC upper Pliocene WWWW M 3/2 CLAYEY LT The entire core consists of structureless olive gray ( 3/2) CLAYEY LT. 859A-9P Entire core given to paleontologists. TE 859 HOLE < \ CORE 0 o.l!!!!! ection CC upper Plio. Note expanded vertical scale. WWWWW M N3 LTY CLAY CORED mbsf Core consists of dark gray (N3) LTY CLAY.

8 TE 859 HOLE A CORE CORED mbsf 859A- ection 0.5j.θ] 2 upper Pliocene i j i 2/ LTY CLAY TO CLAYEY LT Core composed of structureless olive black ( 2/) LTY CLAY TO CLAYEY LT. Minor Lithologies: A small ( cm) pod of LTY CLAY WTH NANNOFOL occurs in ection 3,00 cm. The lower half of ection 3 and the middle part of ection 4 contain small (0.5 cm), circular concentrations of FNE LTY AND which may be burrow fillings. 3 $ s 4 ee M TE 859 HOLE t\ CORE 2P 2= ection t upper Pliocene N3 LTY CLAY CORED mbsf Core consists of dark gray (N3), structureless LTY CLAY.

9 TE 859 HOLE A CORE 3 CORED mbsf 859A-3 ection 5 :.0;!!!!!!!!! 2 CC upper Pliocene i W V 4/ To N4 CLAYEY LT TO LTY CLAY Core consists of thinly interbedded olive gray ( 4/) CLAYEY FNE LT and medium dark gray (N 4) LTY CLAY. ilt beds range in thickness from 0.7 cm to 3 cm, and clay from 0.2 to 0.7 cm. General : The dark gray silty clay interbeds are more indurated. ection CC, cm, contains a breccia of consolidated mud, clay, and silt clasts. sc loq lo (0 5 O

10 TE 859 HOLE i\ CORE 4 CORED mbsf 859A-4 ection 0 i CLAYEY LT TO LTY CLAY 0.5].0] 2 3 upper Pliocene * O O i s 4/ To N4 Core consists of thinly interbedded olive gray ( 4/) CLAYEY fine LT and medium dark gray (N4) LTY CLAY. Beds of clayey fine silt range in thickness from 0.5 cm to 3 cm, and silty clay from 0.2 to 0.7 cm. General : The dark gray silty clay interbeds are more indurated. solated pebbles are found in ection 3, intervals cm and cm. No post -depositional structures are preserved (excluding possible drilling disturbance). 4 UC s M TE 859 HOLE \ CORE 5P CORED mbsf ection 0.- o.sc t upper Pliocene <; 5GY 2/ CLAYEY LT Core consists of greenish black (5GY 2/) CLAYEY LT. General : Core exhibits a fissility in horizontal plane which is probably due to special nature of recovery in pressure core barrel.

11 TE 859 HOLE A CORE 6 CORED mbsf 859A-7 CC ection 0.5] CC upli _ M 4/ CLAYEY LT AND LTY CLAY The core consists of thinly interbedded olive gray ( 4/) CLAYEY LT beds that locally display reverse grading, and medium dark gray (N4) LTY CLAY. Clayey silt beds are approximately to 2 cm thick, silty clay intervals approximately 0.3 to 0.7 cm. General : The bedding characteristics in this core are very similar to some patterns of core disturbance known as "drill biscuits" or "biscuiting". However, the intervals here have grain size variations at the scale of the observed interbeds. The interbeds of silty clay are stiffer than the clayey silt and show uniform thicknesses across the central portions of each core. However, other cores in this hole (e.g., 4-859A-9) have soft clayey intervals consistent with a "biscuit" model. TE 859 HOLE A CORE 7 CORED mbsf ection CC o A o η> V upper Pliocene s ss N3 ANDY LT TO LTY CLAY Dark gray (N3) ANDY LT to LTY CLAY. Olive gray ( 4/) CLAYEY LT between 6-8 cm. Lower portions mostly LTY CLAY. 0.- U0 05 U0,5 go- lau no _J { eo General : Core is totally disturbed by drilling, consisting of soupy and biscuited material. es 30 _. _J ffis 40

12 TE 859 HOLE A CORE 8 CORED mbsf 89A-8 CC ection 05 :.0; jljljljljl... i. i. i. i. ijijiiiji! CC upli OO MMM s s M N3 LTY CLAY Core is interbedded dark gray (N3) and olive gray ( 4/) LTY CLAY. General : Core is highly disturbed by drilling and exhibits drilling biscuits. TE 859 HOLE 0.5" ection CC uplio. \ CORE 9 0 <: M N3 CORED mbsf LTY CLAY TO CLAY Dark gray (N3) LTY CLAY to CLAY. Cores show drilling biscuits. TE 859 HOLE i\ CORE 20 : ection CC i 4/ CORED mbsf CLAYEY LT TO LTY CLAY The less disturbed portions of this core consist of thinly interbedded olive gray ( 4/) CLAYEY LT and medium dark gray (N4) LTY CLAY.

13 TE 859 HOLE i\ CORE 2P CORED mbsf 859A-2P 859B-R 0.- o.z ection " 5GY 4/ LTY CLAY TO CLAYEY LT The core consists of dark greenish gray (5 GY 4/) coarse CLAYEY LT layers interlayered with medium dark gray (N4) LTY CLAY layers. The apparent interlayering may be due to drilling disturbance. DRLLED mbsf TE 859 HOLE B CORE R CORED mbsf 5GY 2/ CLAYEY LT The core consists of structureless greenish black (5GY 2/) CLAYEY LT. Minor Lithology: There are several fragments of olive gray ( 3/2), carbonate-cemented LTTONE in ection, 0 to 2 cm, which may be fragments of a carbonate concretion. ee General : The core is extremely fragmented and probably consists of soft drilling breccia.

14 TE 859 HOLE B CORE 2R CORED mbsf 859B-2R 0.5J.0].... ; j i; j i; ; i; i j i; i; i j i j i j i j i j i j j j!!!!!!!!!!!!!!!!!! Void!!!!!!!!!!! ection upper Pliocene o Jö wwwwwwwwwwwwwwwwwwwwwwwwwwwww V\ M R 4/ To 5GY 4/ LTY CLAY to CLAYEY LT This core consists entirely of olive gray ( 4/) to dark greenish gray (5GY 4/) LTY CLAY to CLAYEY LT. A mottled appearance due to variations in color and grain size occurs throughout the core. General : The core is extremely disrupted by drilling and may be a drilling breccia, although a clear separation between matrix and clasts is not possible. ome medium dark gray (N4) concretions resembling small subangular pebbles are dispersed throughout the core. A complete shell and other partial shell fragments are visible at ection, cm. Although variations in both texture and composition occur, true bedding contacts do not appear to be preseved.

15 TE 859 HOLE B CORE 3R CORED mbsf LTY CLAY TO CLAYEY LT Core consists of mottled grayish olive ( 4/) LTY CLAY to CLAYEY LT Minor Lithologies: Abundant clots, partial laminae, and streaks of medium dark gray (N4) silty clay occur throughout the core. 2/ 2-4/ General : The core, despite zones of moderate to intense drilling disturbance, has several intervals that exhibit aligned concretions and dark gray streaks of silty clay that demonstrate the partial preservation of bedding. ome mottled textures may be due to burrowing (ection 6, 0-50 cm). Beds defined by dark clay layers and by stringers of aligned concretions are steeply inclined and locally folded. DRLLED mbsf

16 TE 859 HOLE B CORE 4R CORED mbsf 89B-4R ection 5 :.0] !!!!!!!!!!!! 2 fifi upper Pliocene wwwwwwwwwww 0 M 2/ CLAYEY LT Olive black ( 2/) structureless CLAYEY LT. General : The lower parts of ection 2 also contain small clasts of very fine sand. mall areas of dark greenish gray (5GY 4/) CLAYEY LT with traces of spicules and volcanic glass occur at ection 2, cm and ection 2, cm. 859B-5R Entire core given to paleontologists. 859B-6R THROUGH 8R NO RECOVERY TE 859 HOLE B CORE 9R CORED mbsf ection :?!r-!r-zr- CC o.l u. Pli. Note expanded vertical scale. www V N3 LTY CLAY Fragments of dark gray (N3) LTY CLAY.

17 TE 859 HOLE B CORE 0R CORED mbsf 859B-0R ection LTY CLAY TO CLAYEY LT 0.5;.θ] Core consists of dark gray (N3) and medium dark gray (N4) structureless LTY CLAY to CLAYEY LT. 2 3 upper Pliocene $ N3 To N4 General : The upper parts of ection contain a small percentage of very fine-grained sand. n ections 3, 4, 5, and CC, clay content is higher than in ections and 2. The core is highly disturbed by drilling and contains mostly drilling fragments of clay and silty clay with some loose silt. ections 5 and CC were opened by wire cutter, producing a difference in apparent surface structure. M...,.,.,,... h!i!i!i!i!i!i!ih!i!i!i!i Vnirl l l l l l l l l l.,..., r M

18 TE 859 HOLE B CORE R CORED mbsf 859B-R CC 0.5].0; ll!!!!!!!!! ection ee upper Pliocene W OO WWWWW Z CO CO 5GY 4/ LTY CLAY to CLAYEY LT This core consists of dark greenish gray (5GY 4/) CLAYEY LT and LTY CLAY. General : The core is totally disrupted by drilling. Large fractures apparently were caused by gas expansion upon core removal. Fractures are not perpendicular to core sides because of diagonal orientation of wire cutter.

19 TE 859 HOLE 3 CORE 2R - 0.5] - ~ **"" ~ ~~ ~~.0; ; ~ ~ ~ ~ ~ 2 - "_r _r _r"_r. - ~JZ Z ection - Void - πszszszs3 - nnszn: -rlrür jrl ~-^~-^~. CD c CD Q. O > > > >- > KfiV 4/ CORED mbsf LTY CLAY to CLAYEY LT This core consists of dark greenish gray (5GY 4/) to grayish olive green ( 3/2) LTY CLAY to CLAYEY LT. General : A small yellowish spot of calcareous sediment occurs at ection, 29 cm. Thp pπrp iç tntallv Hi^π intpri hv rlrillinπ lie VAJW 0 luiciiiy uioi LJi^iotai *Jy vjiiiiniu and by gas expansion fractures perpendicular to edge of core. ections, 4, and CC were cut by wire; ections 2, 3, and 5 were cut by saw, resulting in different surface textures. 859B-2R i - =!!!!! 4 5 ec : wwww M 3/2

20 TE 859 HOLE B : ection] CORE O 3R CORED LTY CLAY TO CLAYEY LT mbsf 859B-3R 0.5_; - j^j Ej ErEr 2 -."in_"i_"i_ _r"_r"_r"_r". ; 3 - nnnrzs - "_r"_r"jr"_r". ir"_r"_i"_r z"_r_nr"_r{ i i i ii i i i nrzszn:.- c O CD CD ü δl pper o o > > :> > > >> $: T Q O s w 3/2 This core consists of olive gray ( 3/2) LTY CLAY to CLAYEY LT. General : Two subangular fragments of micritic limestone are found at ection 2, 86 and 96 cm. The core is largely disrupted by drilling, except in two intervals: ection 2, cm and ection 8, cm. n the first of these intervals, semicoherent claystone fragments preserve nearly original orientation across fractures. n the second interval, bedding defined by color and textural changes is crosscut by normal to vertical microfaults. All of core catcher (3 cm) went to paleontology. i i i i i i i M M i Mi!i!i!i!i i i i i i 6 vwwwv\ > s,,!,...!.,.,!...il.i j j lllllll!!!!!!!!!!! 7 8 j s

21 TE 859 HOLE B CORE 4R CORED mbsf 859B-4FM CLAYEY LTTONE to LTY CLAYTONE This core consists of olive gray ( 3/2) LTY CLAYTONE to CLAYEY LTTONE. General : Most of the core exhibits gas expansion fractures perpendicular to core sides. ections 4 and 5 contain intervals of semi-coherent ciaystone chips that fit together across fractures. Bedding is not preserved due to disruption by drilling and splitting of the core. 3/2

22 TE 859 HOLE B CORE 5R CORED mbsf 859&-5R o LTY CLAYTONE 3/2 This core consists of olive gray ( 3/2) to greenish black (5GY 2/) LTY CLAYTONE. ß r 5GY 2/ 3/2 General : From ection, cm to ection 2, 95 cm, the core is totally disrupted by drilling and splitting of the core. emi-coherent zones of highly fractured fissile LTY CLAYTONE occur from ection 2, cm, cut by a subhorizontal anastomosing array of cracks filled with bubbly froth. These fractures probably represent gas expansion along incipient fissility or fracture cleavage. Below ection 2, 35 cm, the core is totally disrupted by drilling.

23 TE 859 HOLE B CORE 6R CORED mbsf 859B-6R ü LTY CLAYTONE TO CLAYTONE This core consists of dark gray (N3) LTY CLAYTONE to CLAYTONE. ections 4,5, and CC are more clay-rich than the upper portions of the J N3 Minor Lithology: Dark gray (N3) very fine-grained massive LTY ANDTONE occurs as an interbed from ection 3,25 to ection 4, 30 cm. The upper and lower contacts of this bed are gradational over an interval of a few centimeters. ± ±± ± ± > General : The core is highly disturbed by drilling. t contains mostly drilling fragments of claystone and silty claystone with loose sand and silt and some coherent pieces of fine-grained sandstone. solated intervals of semi-coherent material exhibit anastomosing fracture cleavage spaced -2 mm apart with a wavelength of 3-8 mm.

24 TE 859 HOLE B CORE 7R CORED mbsf 859B-7R/ m CLAYEY LTTONE TO LTY CLAYTONE The core consists of brownish black (R 2/), to medium dark gray (N3), to grayish black (N2) CLAYEY LTTONE TO LTY CLAYTONE. R 2/, N3 to N2 Minor Lithology: At ection, cm a brecciated zone occurs which consists of fragments of medium dark gray (N3) carbonate-cemented ANDY LTY CLAYTONE cross-cut by fine calcite veins. A carbonate-cemented zone also occurs at ection,29-39 cm.

25 TE 859 HOLE B CORE 8R CORED mbsf 859B-8R; <D Q. ü LTY CLAYTONE The core consists of dark gray (N3) LTY CLAYTONE. N3 General : One fragment ( by 5 cm) of olive gray ( 4/) calcareous micrite-cemented sediment occurs at ection, cm. ection 2, 20-7 cm is finer grained than the rest of the section. Coherent slightly inclined intervals of clayey siltstone occur at ection 3, cm and cm. ection 4, cm and cm; and ection 5, cm and 0-0 cm are grayish black (N2) silty claystone. ection 5, cm is coarser grained than the claystones above and is slighty faulted and fractured. The core is highly disturbed by drilling. t contains mostly drilling breccia of silty claystone with some loose silt. Below ection 5, 25 cm, some layers exhibit layer-parallel extension. Minor fractures or veins occur in the coarser lithologies.

26 TE 859 HOLE B CORE 9R CORED mbsf 859B-9R e a. LTY CLAYTONE Core consists of olive black ( 2/) LTY CLAYTONE. Minor Lithology: A more coherent section of olive black ( 2/) ANDY LTTONE occurs at ection, 72 to 83 cm. P 2/ General : A -cm, dark greenish gray (5GY 4/), foram-bearing calcareous fragment occurs at ection 2, 50 cm. Most of the core consists of drilling breccia, but within relatively coherent intervals the following structures are preserved: fault or small shear zone at ection, 32 cm; block of silty material with polished surfaces at ection 3, 50 cm; two sets of fracture cleavage, sub-perpendicular to each other, at ection 3, cm and ection 4, cm. pacing of the fracture cleavage is 2-5 mm with a wavelength of 3-20 mm.

27 TE 859 HOLE B CORE 20R CORED mbsf 859&-20R Q. CO Ü LTY CLAYTONE This core consists of olive gray ( 2/) LTY CLAYTONE. General : The core is disrupted by drilling. Two semi-coherent intervals, at ection 3, cm and cm, contain two sets of fracture cleavage that are nearly perpendicular to each other. n the best preserved intervals, the two sets of fracture cleavage are subhorizontal and subvertical. 2/

28 TE 859 HOLE B CORE 2R CORED mbsf 859&-2R Q. CO LTY CLAYTONE This core consists of olive black ( 2/) LTY CLAYTONE. ß ß ß 2/ General : At ection, 0-7 cm, a dropstone of diorite occurs. ts position at the top of the core suggests that it may have fallen into the core from higher in the sequence. At ection 3,0-02 cm, a smear slide indicates the presence of inorganic calcite within the claystone. ections 2 (5-80 cm) and 4 (50-80 cm) consist of semi-coherent claystone chips that fit together along a closely spaced fracture cleavage. mall intervals of semi-coherent, highly fractured silty claystone occur in ections and 3. ß< ß<

29 TE 859 HOLE B CORE 22R CORED mbsf 859B-22R CC 0.5] J *J *V *V J.0j ection fifi upper Pliocene \ s 'w 2/ CLAYTONE This core consists of olive black ( 2/) CLAYTONE. A very faintly defined structure of dark gray wispy stringers may represent bedding; several subparallel features are offset slightly along microfractures. TE 859 : - 0.5] z z - h- - s ^ -^ -^ -^ J- +J- ^J *V *V. -, - -,.,.%,.i J K- *v K- K- J > j *v HOLE ^J ^J J *v ^ *J *J- J ^j *j- V +j- ection l J- *J *J- Λ V *V.0: 2 O Φ 0 Qi α5 Q. B CORE 23R x x 0 s s M 2/ CORED CLAYTONE This core consists of olive black ( 2/) CLAYTONE. mbsf General : The core is disrupted by drilling. A fine (<0.4 cm diameter) drilling breccia is found throughout the core except in ection 3, 0-2 cm and cm.n those intervals, at least two subhorizontal sets of fracture cleavage occur that are nearly perpendicular to each other; a third set of subvertical fractures is locally present. 859B-24R NO RECOVERY

30 TE 859 HOLE B CORE 25R CORED mbsf 859B-25R o LTY CLAYTONE TO CLAYEY LTTONE Core consists of olive black ( 2/) LTY CLAYTONE TO CLAYEY LTTONE. 2/ General : The entire section (except for ection 5, cm) consists of a drilling breccia. Although the core at ection 5, cm is more coherent, no distinct sedimentary structures are present; local mottling in this interval may be a drilling artifact. w, > M

31 TE 859 HOLE B CORE 26R CORED mbsf 859B-26R ' J K ection 2 3 upper Pliocene AAAAAA AAAAA Al M CO O CM Z - Z LTY CLAYTONE TO CLAYTONE Dark gray (N3) to grayish black (N2) LTY CLAYTONE to CLAYTONE. General : ome parallel laminae of clay and silty clay are seen in ection,39-40 cm and cm and in ection 2, cm. ections 2 and 3 are slightly finer-grained than ection. Highly disturbed portions of the core contain mostly fragments of silty claystone to claystone and some loose silt.

32 TE 859 HOLE B CORE 27R CORED mbsf _9 α. to LTY CLAYTONE The core consists of olive black ( 2/) LTY CLAYTONE. 2/ General : ections 3, 4, and CC are slightly more clay-rich than ections and 2. Two fragments ( by cm and by 4 cm) of greenish gray (5GY 6/) calcareous micrite-cemented sediment occur in ection, cm. The lower parts of the ection contain traces of organic matter. More coherent intervals occur in ections 2,22-38 cm; ection 3, cm and ection 4, cm. Due to drilling the core is fractured into fragments of silty claystone and claystone with some loose silt.

33 TE 859 HOLE B CORE 28R CORED mbsf 89B-28 > > w > > > > > M o 2/ LTY CLAYTONE The core consists of olive black ( 2/) LTY CLAYTONE. General : The core is highly disrupted, but there are some semi-coherent intervals: ection, cm; ection 2, cm; ection 3,4-48 cm; ection 4, cm; and throughout ection 5. The composition of these semi-coherent zones is similar to surrounding drilling breccia.

34 TE 859 HOLE B CORE 29R CORED mbsf 859B-29R Q. CO LTY CLAYTONE TO CLAYTONE This core consists of greenish black (5G 2/) LTY CLAYTONE to CLAYTONE. 5G 2/ General : A fragment of olive gray ( 4/) fine grained calcite exists at ection, 5-7 cm. Although the entire core is highly fractured drilling breccia, short intervals of semi-coherent material exhibit fracture cleavage sets of consistent orientation.

35 TE 859 HOLE B CORE 30R CORED mbsf 859B-30R CLAYTONE TO LTY CLAYTONE This core consists of greenish black (5GY 2/) CLAYTONE to LTY CLAYTONE. General : This core alternates between intervals of massive soft clay with claystone fragments, and highly fractured claystone with two sets of fracture cleavage that are sub-perpendicular to each other. A single wispy bed of dark clay occurs at ection CC, 5 cm. 5GY 2/ 859B-3 R NO RECOVERY

36 TE 859 HOLE B CORE 32R CORED mbsf 859B-32R ü 0.5" CC W M 4/ To 5G 2/ LTY CLAYTONE TO CLAYEY LTTONE The upper part of this core (to approximately ection,00 cm) is composed of olive gray ( 4/) to greenish black (5GY 2/) LTY CLAYTONE. The lower part is composed of interbedded olive gray ( 4/) to greenish black (5GY 2/) LTY CLAYTONE and olive gray (5GY 4/) CLAYEY LTTONE. Minor Lithologies: The lower part of the core has interbeds of olive gray ( 4/) CLAYEY LTTONE that are -5 cm thick. General : Layering is highly disturbed, and thicknesses vary considerably across the core. The more brittle intervals of claystone have both east-dipping and west-dipping sets of fracture cleavage. n ections 2 and CC, wispy dark clay layers exhibit variable orientation and undulatory contacts between clayey and silty intervals * -" 20 ctj ~~" O

37 TE 859 HOLE B CORE 33R CORED mbsf 859B-33R j CC LTY CLAYTONE N 4 to 5G 4/ The upper part of the core is composed of mottled medium dark gray (N4) to greenish black (5G 2/) LTY CLAYTONE.The lower part of the core consists of this lithology interbedded with the minor lithologies. Minor Lithologies: ections 2 and CC consist of the dominant lithology interbedded to interlaminated with light medium gray (N3) coarse LTTONE TO CLAYEY LTTONE. General : The claystone has at least two sets of fracture clavage sub-perpendicular to each other. n ection 2,5 cm to 90 cm, silty fragments in clayey matrix exhibit layer-parallel extension and pull-aparts along discontinuous normal microfaults. The silty layer or bed at ection 2, cm is characterized by deformation bands consisting of dark seams 0.5- mm thick spaced 5-0 mm apart. The upper and lower boundaries of this layer dip towards each other, defining a phacoidal shape. 90-

38 TE 859 HOLE B CORE 34R CORED mbsf 859&-34R LTY CLAYTONE TO CLAYEY LTTONE Core consists of olive black ( 2/) LTY CLAYTONE to dark gray (N3) CLAYEY LTTONE. Poorly defined layering is present in ection 4,5 cm. Minor Lithology: The lower part of ection 4 consists of mottled dark gray (N3) LTY CLAYTONE to olive black ( 2/) CLAYTONE. A single fragment of micritic limestone ( by 2 cm) occurs in ection, 2-4 cm. General : Although most of the core consists of highly fractured drilling breccia, some semi-coherent intervals occur in ection 3, cm and ection 4, cm. These exhibit systematic microfractures and web structure (calcite-filled veinlets along fractures).

39 TE 859 HOLE B CORE 35R CORED mbsf 859B-35R LTY CLAYTONE Core consists of olive black ( 2/) LTY CLAYTONE. 2/ Minor Lithology: An interval of olive black ( 2/) LTTONE occurs from 0-0 cm in ection 4. General : The core consists of drill cuttings with isolated semi-coherent zones in the following intervals: ection 2, cm; ection 3, cm and cm; and ection 4, 0-0 cm. No structures are preserved.

40 TE 859 HOLE B CORE 36R CORED mbsf 859B-36R 0.5 Φ Q. CO CO M O 2/ LTY CLAYTONE and MCRTC LTY CLAYTONE Major Lithologies: ection consists of olive black ( 2/) LTY CLAYTONE, and ection 2 consists of olive black ( 2/) MCRTC LTY CLAYTONE. Amount of carbonate in cuttings increases down core, with a significant change at the boundary between ections and 2. General : The core is structureless and consists entirely of drill cuttings. TE 859 HOLE B CORE 37R CORED mbsf J- +J- *J *V *M-.-,-,--, -s-^ j- *v *v *v v- 0.5;.-,.-, -s-^i -^.θj *V- *V *V- +Ji vr *v KP *v --^i--i j. ^- -M.J..- *..-,.\ -,-\ -^ j- *v *j- *v Ar j. *.- J.^ J... i.- >--^i--^ j- +J- ±j ^ *v ^l--->-^ --^l-^l-^ j. -^.- ->..- J..- ^.- j K Lj *v *v J- *V *J- *V *V ection upper Pliocene 2 ed O \ xxxxxxxxxxxx M N3 CLAYTONE The core consists of dark gray (N3) CLAYTONE. Minor Lithology: A thin interbed of CLAYEY LT with sharp lower and gradational upper contacts occurs in ection CC, 2-4 cm. General : ilt grains are partially coated with thin rims of recrystallized clay. A fragment (2 by 4 cm) of micritic limestone with foraminifers and pyrite concretions occurs at the top of ection.

41 TE 859 HOLE 3 CORE 38R 0.5j -.θj ection _ Λ -\ -s J 2 ->. ->. ->. J. Λ -Λ -s -\ -v - Λ \ _\ _\. J. J. J. J.. JC Φ Φ O = lio LJ- Q. o V\ MR 0/ CORED mbsf LTY CLAYTONE and ANDY LTY CLAYTONE Major Lithologies: The core predominantly consists of olive black ( 2/) LTY CLAYTONE (ection, 5-50 cm) and ANDY LTY CLAYTONE (ection 2,5-90 cm). Minor Lithologies: The base of the core (ection CC, 0-5 cm) consists of interlaminated, olive black ( 2/) LTY AND, CLAYEY LT, and LTY CLAY. A 3 cm fragment of dark greenish gray (5GY 4/) foram-bearing micrite occurs at the top of ection. 859B-38R i General : The core consists of drilling breccia, except for a relatively undisturbed semi-lithified zone in ection CC, 0-5 cm.