Proterozoic Eon

Question 1

when did kola and karelia craton break apart

Answer 1

2.45 GA

Question 2

oldest and longest ice age

Answer 2

huronian glaciation, 2.4 to 2.1 GA

Question 3

caused the first mass extinction

Answer 3

the great oxygenation event, 2.4 GA

Question 4

2 effects of the great oxygenation event

Answer 4

1. BIF deposition
2. huronian glaciation

Question 5

landmass made of North America, Greenland, parts of northwestern Scotland, and baltic shield of Scandinavia

Answer 5

Laurentia

Question 6

supercontinent 1.8 - 1.2 GA

Answer 6

Columbia

Question 7

Now is East Europe and Northwestern Eurasia

Answer 7

Baltica

Question 8

geologic province in northern south america

Answer 8

amazonian craton

Question 9

geologic province in southern africa

Answer 9

kalahari craton

Question 10

1.3 to 1 GA orogenic event that formed the Appalachian Mountains

Answer 10

Greenville Orogeny

Question 11

supercontinent 1.3 to 1 GA

Answer 11

rodinia

Question 12

ocean that surrounded rodinia

Answer 12

mirovia

Question 13

two rapid glaciation events

Answer 13

cryogenian ice age

Question 14

what caused the cryogenian ice age

Answer 14

the breakup of rodinia

Question 15

consolidated masses of unweathered blocks and glacial till in a rock flour

Answer 15

tillite

Question 16

oldest known eukaryotes

Answer 16

bangiomorpha 1.2 GA

Question 17

oldest known megafossil

Answer 17

grypania

Question 18

cysts of planktonic algae

Answer 18

acritarchs

Question 19

first controversy free fossils

Answer 19

ediacaran fauna

Question 20

3 phyla represented in ediacaran fauna

Answer 20

1. cnidaria
2. annelida
3. anthropoda

Question 21

ancestor of trilobites

Answer 21

spriggina

Question 22

orogenic event in the southern hemisphere continents

Answer 22

pan-african orogeny

Question 23

rodinia’s separate pieces reassembled

Answer 23

panotia

Question 24

panotia’s breakup formed

Answer 24

iapetus ocean