Answers Review Book Questions- Unit 7: Geologic History
Page 253
1.1 2.2 3.2 4.3 5.4 6.1 7.2 8.4 9.3 10.1 11.2 12.3 13.1 14.3 15.3
Page 259
1. 1 2.4 3.4 4.4 5.1 6.2 7.3 8.3 9.4 10.2 11.2 12.3 13.4 14.2
Page 264
1.4 2.4 3.4 4.4 5.3 6.1 7.2 8.2 9.2 10.4 11.3 12.4 13.2 14.4 15.4
Page 268
1.1 2.2 3.3 4.3 5.1 6.2 7.3 8.1 9.4 10.3 11.1 12.3 13.2 14.4 15.4
Page 273
1.3 2.1 3.4 4.1 5.2 6.2 7.1 8.2 9.2 10.1 11.2 12.4 13.1 14.1 15.2
Page 277
1.
Limestone, Sandstone, Basalt, Shale
2.
E,D,B,A,C
3.
Clay
4.
Large crystal size.
5.
a. Layers A,B, and C are deposited. Area is uplifted above sealevel and eroded.
Area is submerged below sealevel and layer D is deposited. b.
B and D. c.
Erosion occurred on the surface of B and then layer D was deposited on top.
6.
Rock similarity or index fossils.
7.
In book.
8.
Limestone is the most resistant to erosion because it sticks out from the cliff the furthest.
9.
542 MYA.
10.
Western New York State was covered by warm tropical water during the
Ordovician period (488-444 MYA).
11.
3 MY ago.
12.
Rock layers were deposited and then they were overturned resulting in the oldest layer on top (Cambrian) and the youngest on the bottom (Devonian).
13.
Triassic
14.
Matching outlines of continents, matching fossils, mineral deposits and mountain ranges.
15.
NW
16.
Bedrock in the Adirondacks are metamorphic and fossils are usually not found in metamorphic rocks.
17.
stream erosion
18.
Devonian

19.
See graph grid.
20.
100 years.
21.
Cretaceous
22.
Fossils do not form in Igneous rocks.
23.
The fault breaks and moves all the other layers.
24.
There is contact metamorphism on both A and C.
25.
The rock layers are folded underneath the unconformity indicating that a great deal of time has passed.
26.
The rocks had to form first before they were folded.
27.
Volcanic ash is rapidly deposited over a wide area.
28.
The irregular surface indicates and unconformity.
29.
1-limestone 2-shale 3-sandstone 4-volcanic ash 5-shale 6-limestone 7-basalt
30.
Permian
31.
See graph in book.
32.
100 grams (4 half lives- only 1/16 of the original amount remains).
33.
9.0 BY. (ratio is ¼, 2 half lives, 2 X 4.5 BY).
34.
Insects
35.
Ammonoids, trilopbites, dinosaurs.
36.
Brachiopods, Frogs and toads,.
37.
End of Cretaceous.
38.
Horses
39.
Trilobites
40.
Formation of Pangea. This would decrease shallow water environments.