using fossils to establish relative timescale

Question 1

rugose coral peak

Answer 1

carboniferois

Question 2

tabulate coral peak

Answer 2

Silurian and devonian

Question 3

long hinged brachiopod indicate which era

Answer 3

Mesozoic

Question 4

LONG hinged brachiopod indicates which era

Answer 4

paleozoic

Question 5

SHORT hinged brachiopod indicates which era

Answer 5

Mesozoic and younger

Question 6

interesting point about bivalves and brachiopods

Answer 6

bivalves occupied brachiopod niches after permo-triassic when brachiopod numbers dwindled

Question 7

goniatites indicate which periods

Answer 7

Devonian - Permian

Question 8

ceratites indicate which periods

Answer 8

Permian

Question 9

ammonites indicate which periods

Answer 9

Triassic - cretaceous

Question 10

trilobites indicate which era

Answer 10

Palaeozoic

Question 11

graptolites indicate which era

Answer 11

palaeozoic

Question 12

graptolites abundant in which period

Answer 12

Ordovician and silurian

Question 13

which era were echinoid more abundant although they (regular) have been around since cambrian

Answer 13

Mesozoic and younger