Prelim inary report on M iddle Jurassic strata and fossils from L inglongta area of Jianchang, L iaon ing

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1 Vol128 No12 GLOBAL GEOLOGY Jun : (2009) ,,,,, :,,,,,, : ; ; ; ; ; : P534152; Q : A do i: / j1issn Prelim inary report on M iddle Jurassic strata and fossils from L inglongta area of Jianchang, L iaon ing DUAN Ye, ZHENG Shao2lin, HU Dong2yu, ZHANG L i2jun, WANG W u2li Paleontological Institute of Shenyang N orm al U niversity, Shenyang , China Abstract: A set of sediments yielding abundant fossils, sandw iched in volcanic rocks, outcrop in the L in2 glongta area of J ianchang County in western L iaoning Province. The fossils consist of conchostracans, ostracods, bi2 valves, fish, insects, p lants, vertebrates, etc. B ased on the regional stratigraphic investigation, measuring geolog2 ical section and synthetic study of the fossils new ly collected in the Daxishan site, the authors have assured the sed2 iments belonging to the Tiaojishan Formation aged in M iddle Jurassic, and the form ation is underlying the Yixian Form ation stratigraphically. The fossil assemblage of the Tiaojishan Formation indicates the characters of the M iddle Jurassic Yanliao B iota. Key words: M iddle Jurassic; Tiaojishan Formation; measured section; fossils; L inglongta area; J ianchang country 0,,,, [ 1, 2 ] [ 3 ], ( ),,,,,,, 10 ;, 2 : ; : : ( , 2008S214) ( GPMR200603).

2 144 28, ( ) [ 4 ] ; [ 5 ], ( ),,, 2 ( ), (2009), 10 [ 6, 7 ],, 1, 1 20, [ 1, 2 ], ( ) [ 3 ] ( ),,,,,,,,,,, :,, 2009, 5, ( 1) : 1 km, 500 m, 325, m ( 2) 1 F ig11 Geograph ic position of T iaojishan Forma tion in Dax ishan of L inglongta, J ianchang.. :, ( )

3 2 : F ig12 Prof ile map of geolog ica l section of T iaojishan Forma tion in Dax ishan of L inglongta, J ianchang : /m (29) (28) 7125 (27) 6196 (26) 8170 (25) (24), 1109 (23) (22), 0127 (21) 0120 (20) 2, 1168 (19) 2, : N eocalam ites carcinoides, N. nathorsti, Equisetum sp., Coniopteris hym enophyllodes, C. m argaretae, Zam ites cf. gigas, Czekanow skia rigida, C. ketova, Phoenicopsis speciosa, Spenobaiera kazachstanica 9126 (18) (17), : Darw inula sarytirm enensis, D. im pudica, D. m agna, D. subm ag2 na, D. changxinensis, D. erenhotensis, D. incurva, D. xiaofenzhangziensis, Tim iriasevia catenularia 0143 (16), (15),, 7160 (14) (13) 2, : Ptycholep idae?, : Aeschnoidae, : Euestheria sp., : Shaanxiconcha cliovata 7144 (12) (11), 5158 (10) (9) (8) 5158 (7) 2156 (6) (5) (4) (3) 4125 (2) 4116 (1) : 2 : Euestheria sp. Polyg raota? spp. ; D arw inu la sarytirm enensis, D. im pud ica, D. m agna, D. subm agna, D. changx inensis; D. x iaofenzhangz2 iensis Tim iriasevia ca tenularia ; Shaanx2 iconcha cliovata; A eschnoidae ( indet. ) ; P tycholepidae? (?) ; N eoca lam 2 ites ca rcinoides, N. na thorsti, Con iopteris hym enophy l2 loides, C. m a rga retae, Z am ites cf. g igas, Czek2

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