Proterozoic Eon

Question 1

Proterozoic Eon lasted how many billion years?

Answer 1

1.958 billion years

Question 2

% of the Proterozoic Eon of all geologic time

Answer 2

42.5%

Question 3

The breakup of Kenorland was contemporary with the?

Answer 3

Huronian glaciation

Question 4

It is the oldest and longest ice age (300 million years), occurring at a time when only simple, unicellular life existed on Earth.

Answer 4

Huronian Glaciation

Question 5

• Causes the First Mass Extinction on Earth

Answer 5

The Great Oxygenation Event

Question 6

2 effects of the GOE

Answer 6

Deposition of Banded Iron Formation
Huronian Glaciation

Question 7

the most famous rock of the Proterozoic Eon

Answer 7

Banded Iron Formation

Question 8

The Kenorland provided the _____ around which Proterozoic crust accreted, thereby forming much larger landmasses.

Answer 8

nuclei

Question 9

a landmass made up of what are now North America, Greenland, parts of northwestern Scotland, and perhaps some of the Baltic shield of Scandinavia.

Answer 9

Laurentia

Question 10

Formation of a Continent is a complex process which includes: (4)

Answer 10

amalgamation of cratons
the accretion of volcanic arcs and oceanic terranes
extensive plutonism, metamorphism, and volcanism
resulting to orogenies

Question 11

named after the Canadian geologist J. Tuzo Wilson, includes rifting and the opening of an ocean basin with passive continental margins on both sides.

Answer 11

Wilson Cycle

Question 12

7 Stages of the Wilson Cycle

Answer 12

Stable Craton
Early Rifting
Full Ocean Basin
Subduction Zone
Closing Remnant Ocean Basin
Collision Orogeny
Peneplained Mountain

Question 13

existed from 1.8 to 1.5 billons years ago, that is, from the beginning of the Statherian period until the end of the Calymmian.

Answer 13

Columbia (Nuna or Hudsonland)

Question 14

is a large continental craton that forms the ancient geological core of the North American continent.

Answer 14

Laurentia

Question 15

Laurentia is also called?

Answer 15

North American Craton

Question 16

was a late Proterozoic, early Palaeozoic continent that now includes the East European craton of northwestern Eurasia.

Answer 16

Baltica

Question 17

is a geologic province located in South America. It occupies a large portion of the central, north and eastern part of the continent.

Answer 17

Amazonian Craton

Question 18

Is a craton, an old and stable part of the continental lithosphere that occupies a large portion of South Africa and consists of the Kaapvaal, the Zimbabwe Craton, the Limpopo Belt, and the Namaqua Belt.

Answer 18

Kalahari Craton

Question 19

A Mesoproterozoic orogenic event in Laurentia that took place in the eastern part of the evolving continent

Answer 19

Grenville orogeny

Question 20

Grenville orogen is a result of?

Answer 20

closure of an ocean basin

Question 21

Grenville orogeny may have been the final episode in the assembly of what supercontinent

Answer 21

Rodinia

Question 22

Assembled between 1.3 and 1.0 billion years ago and then began fragmenting 750 million years ago. Was surrounded by the super ocean geologists refer to as Mirovia.

Answer 22

Rodinia

Question 23

When Rodinia started to break apart, it caused sudden _______

Answer 23

gigantic rifts in the seafloor

Question 24

Ice age that has never been seen again in Earth’s history. Ice caps and glaciers extended all the way from the poles to the middle of equator, covering every inch of the planet, making it look like a giant snowball.

Answer 24

Cryogenian ice age or Varangian Glaciation

Question 25

How did scientists know about the Snowball Earth?

Answer 25

Tillites and other glacial features are found on all continents except Antarctica

Question 26

sedimentary rock that consists of consolidated masses of unweathered blocks

Answer 26

Tillite

Question 27

single celled, probably reproduced sexually, and look remarkably similar to living red algae .

Answer 27

Bangiomorpha

Question 28

the oldest known megafossil, but it was very likely a singlecelled bacterium or some kind of algae.

Answer 28

Grypania

Question 29

hollow fossils that were probably cysts of planktonic algae become common during the Meso- and Neoproterozoic.

Answer 29

acritarchs

Question 30

were once thought to be plants but actually are symbiotic associations between fungi and algae.

Answer 30

lichens

Question 31

the first fairly controversy-free fossils of animals

Answer 31

Ediacaran fauna

Question 32

3 present day phyla represented in the Ediacaran fauna

Answer 32

jellyfish and sea pens segmented worms primitive members of the phylum Arthropoda

Question 33

One Ediacaran fossil, has been cited as a possible ancestor of trilobites, and another may be a primitive member of the phylum Echinodermata.

Answer 33

Spriggina

Question 34

Rodinia’s separate pieces reassembled about 650 million years ago and formed another supercontinent that is called?

Answer 34

Panotia

Question 35

Panotia or Pannotia is also known as?

Answer 35

Vendian supercontinent Greater Gondwana Pan African supercontinent

Question 36

Pannotia formed when Laurentia was located adjacent to what two major South American cratons?

Answer 36

Amazonia and Río de la Plata

Question 37

italian brainrot

Answer 37

tung tung tung tung sahur brr brr patapim bombardiro crocodilo