Date: A Analyse this foasiliferous rock from New York (Fig. A.31A 1. What index

Question

Date: A Analyse this foasiliferous rock from New York (Fig. A.31A 1. What index fossils from Fig.8.13 are presen 2. The overlap in ranges of the index fossils indicates the age of the rock. Express that age range in terms of the period(s) of the grologic time scale, using informal modifiers like early"middle, or "late"as appropriate. Example: late Triassic to early Jurassic Using the information in Fig. 8.13 as your guide, hows old is this rock Express your answer as a range in millions of years Analyze this fossiliferous sand from Delaware (Fig. AB.3.1B) 1. What index fossils from Fig. 8.13 are presenti 2. Express the age range of this sandstone in terms of the period(s) of the geologic time scale using informal modifiers like "early. "middle,or late" as appropriate. 3. Using the information in Fig. 8.13 as your guide, how old is this rock? Express your answer as a range in millions of years G Analyze this fossliferous rock from Ohio (Fig. A8.3.10). 1. What index fossils from Fig. 8.13 are present? 2. Express the age range of this rock in terms of the period(s) of the geologic time scale, using informal modifiers like "early, "middle, late" as appropriate or 3. Using the information in Fig. 8.10 as your guide, how old is this rock? Express your answer as a range in millions of years D Using Fig.8.13, re-evaluate the geologic crosection in Fig. 8.2 based on its fossils. 1. Which two formations are separated by a disconformity? 2. The discontinuity indicates a gap in the rock record. What is the minimum and maximum amount Figure A8.3.1 of time that i not reflected in the rock record in this location? minimum Myr maximum: Myr REFLECT & DISCUSS located? Explain. What geologic event occurred during the Mesozoic Era in the region where Fig. 8.6 is

Explanation / Answer

A) index fossils names - spirifer and trilobite

geological time period spirifer- devonian period

trilobite- cambrion period

rock age - spirifer- 416 to 359 million years ago

trilobite- 509 to 500 million years ago

B) index fossils names - Scaphites- ammenites

geological time period - Cretaceous Period

rock age- 145 to 66 million years ago

C)

index fossils names - trilobite

geological time period

trilobite- cambrion period

rock age -

trilobite- 509 to 500 million years ago

D) figure num 8.2 is not given in question

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