By Gil Brenner OLLI Geology Of New York State and NY City
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1 By Gil Brenner OLLI 2013 Geology Of New York State and NY City
2 Before We Start-- It s All in the PLATES!
3 Geology of New York State including NYC CA. Active Margin A Passive Geologic Margin Gil Brenner 2013
4 Appalachians
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8 Cretaceous Paleogeography 80 MYA
9 Appalachians
10 Tectonic Provinces of North America
11 Rift and Fault Block Basins Remnants of the Breakup of the Super Continent of Pangea 225 MYA CA
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14 ROCKS IN PLATE TECTONIC MODEL
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16 Grennville Orogeny Formation of Rodinia Supercontinent
17 What is a GEOLOGIC MAP???? The oldest Rocks Geologic Map of New York State
18 I billion YO Flat lying rocks Folded Appallachians
19 1 BYO MT. Marcy
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23 Eastern NYS -- along US 84 towards Connecticut
24 W E
25 I billion YO Flat lying rocks Folded Appallachians
26 View from Hudson NY. 107 Miles off Broadway Catskills Heldeberg Escarpment Photo by Gil Brenner
27 400 MYO Silurian
28 TRENTON FALLS Heldeberg Escarpment
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30 TRENTON FALLS, Trenton, NY
31 William J. Bennett Trenton Falls 1885
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33 W E
34 Acadian Orogeny
35 QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture. QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture. Catskill Redbeds Near Phonecia, NY West of Kingston, NY
36 KAATERSKILL FALLS NY
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38 I billion YO Flat lying rocks Folded Appallachians
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46 Fordham Gneiss One Billion YO Bronx and Inwood Section
47 Manhattan Schist
48 Fault linea rift in the crust runs along underneath this street and is known as the 125th Street Fault. The fault line creates a fault valley deep enough to require the IRT Broadway 蔓 Seventh Avenue Line to become a trestle bridge between 122nd and 135th Streets. The street in the 18th century was called The Hollow Way.
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54 A Mts
55 HUDSON STARTS HERE
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57 Mount Marcy Adirondacks
58 LAKE TEAR OF THE CLOUDS
59 The upper Hudson River flows swiftly down from its mountain sources. In the 160 miles between Lake Tear of the Clouds and the Troy Dam, the river drops more than 4,300 feet over natural rapids and man-made dams.
60
61 THE NARROWS
62 Hudson River Narrows
63 East
64 Palisades
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66 Basalt /Diabase - Igneous Rock formed when Pangea Began to split and Atlantic Formed Palisades
67 Immigrated to Boston 1846 QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture. LOUIS AGASSIZ 1840 Swiss DISCOVERER OF THE ICE AGE
68 EVIDENCE FOR GLACIAL EPISODE LOUIS AGGAZIS 1840 ERRATICS
69 How to Become an Erratic! -in Alaska
70
71 THE ICE AGE AND
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73 Basalt /Diabase - Igneous Rock formed when Pangea Began to split and Atlantic Formed Palisades
74 GAP MYSTERY SPARKILL
75 SPARKILL CREEK ROCKLAND COUNTY
76 QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture.
77 PERI-GLACIAL HUDSON 13MYA HUDSON RIVER SPARKILL GAP
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79 Glacial Events Ca. 10,000 YO to Present -Warming 11,000 Younger Dryas (1200Years) 13,350 Younger Dryas(150Years), Lake Iriquois Cold eventevent 21,000 YO Laurentian Ice reaches Long Island
80 Maximum Ice Advance
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82 Wisconsin Terminal Morraine Ice Age-the locus of the terminal moraine. Water poured in white tumult from the melting ice, carrying and sorting its freight of sands and gravels, building the outwash plain: Bensonhurst, Canarsie, the Flatlands, Coney Island.
83
84 Glacial Lake Iroquois was a prehistoric proglacial lake that existed at the end of the last ice age approximately 13,000 years ago.[1] The lake was essentially an enlargement of the present Lake Ontario that formed because the St. Lawrence River downstream from the lake was blocked by the ice sheet near the present Thousand Islands. The level of the lake was approximately 30 m (~100 ft) above the present level of Lake Ontario.[2] The lake drained to the southeast, through a channel passing near present day Rome, New York. The Rome Sand Plains has several sand ridges that geologists think were formed at this time. The channel then followed the valley of the Mohawk River to the Hudson River.[2] The lake was fed by Early Lake Erie, as well as Glacial Lake Algonquin, an early partial manifestation of Lake Huron, that drained directly to Lake Iroquois across southern Ontario, along the southern edge of the ice sheet, bypassing Early Lake Erie.
85 Glacial Lake IroquoisCa. 13,350 YA
86
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88 As the Wisconsin Ice Sheet melted back the Hudson River cut its old path across the Highland narrows to a headward source in the Adirondacks.
89 A Mts
90 HUDSON STARTS HERE
91 But the Hudson River is still with us.
92
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