Geologic Time

Question 1

what is the time of the end of the Proterozoic Eon/Beginning of the Phanerozoic Eon?

Answer 1

• 538 M.Y.A

Question 2

what are the periods in the Mesozoic Era?

Answer 2

• Cretaceous
• Jurassic
• Triassic

Question 3

What Era is the Devonian Period in?

Answer 3

Paleozoic

Question 4

what are the Periods in the Cenozoic Era?

Answer 4

• Quaternary
• Neogene
• Paleogene

Question 5

what is an index fossil

Answer 5

• Has a narrow stratigraphic range, which allows for precise correlation
• can be found in many places
• Easily distinguishable from other fossils

Question 6

what is the time at the beginning of the Mesozoic Era and what era preceded it?

Answer 6

j- 252. M.Y.A
- Paleozoic

Question 7

what is the Principle of Superposition?

Answer 7

all things being equal, the oldest strata will lie at the bottom of a sequence.

Question 8

what are the two types of igneous rock and the characteristics?

Answer 8

1. Intrusive
   
   • cools slowly inside earth
   • forms crystals
2. Extrusive
   
   • cools rapidly on the surface
   • does not form crystals

Question 9

what is the Principle of cross-cutting relationships?

Answer 9

A section of rock cutting through another will be younger than the rock it cuts through.

Question 10

what time denomination is the Paleozoic classify in?

Answer 10

Era

Question 11

what are the Periods in the Paleozoic era

Answer 11

• Permian
• Carboniferous [Pennsylvanian/
  Mississippian]
• Devonian
• Silurian
• Ordovician
• Cambrian

Question 12

what is the Lithostratigraphic Unit and definition:

Answer 12

Formation
- Local, three-Dimensional bodies of rock

Question 13

what Era is the Silurian Period in?

Answer 13

Paleozoic

Question 14

What are the Eons?

Answer 14

• Phanerozoic
• Proterozoic
• Archean
• hadean

Question 15

What Eon does the Paleogene Period belong to?

Answer 15

the Phanerozoic Eon

Question 16

When did the Cenozoic Era Begin?

Answer 16

66. M.Y.A

Question 17

When did the Hadean Eon end and what Eon Proceeded it?

Answer 17

• 4000 M.Y.A
• Archean Eon

Question 18

What are chemical reservoirs?

Answer 18

Bodies of chemical entities that occupy particular spaces
EX: atmosphere, Oceans.

Question 19

Where is Carbon introduced to oceans?

Answer 19

Through Rivers.

Question 20

what are the isotopes in Limestone

Answer 20

CaCO3

Question 21

What is the main producer of methane

Answer 21

Archean Prokaryotes