Ch 21 terms Flashcards Preview

Physical Science 105 Sem 1 > Ch 21 terms > Flashcards

Flashcards in Ch 21 terms Deck (12):
1

fossil

any evidence of former life

2

fossil qualificatiopn

actual remains, altered remains, preservation of the shape of an organism, or any sign of activity (trace fossils)

3

mineralization

deposition of mineral matter by in the pore spaces of an object

4

pertified wood

mineralization and replacement of wood

5

replacement

dissolution and and deposition of mineral matter

6

carbon film

volatile and gaseous constituents are distilled away

7

mold

a void where an organism was buried

8

cast

a void filled with mineral matter

9

clues for geologic process order

principle of uniformity, principles of original horizontality, principle of superposition, principle of crosscutting relationships, shifting of sites of erosion and depositon, faunal sucession

10

radiometric age of rocks

radioactive decay process

11

eras of geologic time scale

cenozoic,paleozoic mesozoic, precambrian

12

periods divided into

epochs