Glossary of Geological Time Scales

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What is 570 Ma and earlier?
Precambrian time
What is the period 190 Ma to 570Ma?
The Paleozoic Era.
What is the period 65 Ma to 190 Ma?
The Mesozoic Era
What is the time period from the present to 65 Ma?
The Cenozoic Era
The Latin suffix "-zoic" means...?
The time between the present and 1.5 Ma is known as
The Quaternary Period
1.5 Ma to 65 Ma
the Tertiary Period
From 65 Ma to 136 Ma is...?
the Cretaceous Period
The time from 136 Ma to 190 Ma is...?
the Jurassic Period
The Cenozoic Era consists of which two periods?
the Quaternary and Tertiary Periods
The Cretaceous and Jurassic Periods comprise which geologic era?
the Mesozoic Era
190-225 Ma ?
the Triassic Period
225 - 280 Ma ?
the Permian Period
the Pennsylvanian Period
from 280 Ma to 320 Ma
320 to 345 Ma ?
the Mississippian Period
the Devonian Period
345 to 395 Ma
the Silurian Period
395 to 430 Ma
430 to 500 Ma ?
the Ordovician Period
the Cambrian Period
500 to 570 Ma
Age of oldest dated rocks
at least 3.5 Ba
The Quaternary Period is comprised of these two Epochs
the Recent and Pleistocene Epochs
the epoch between the present and 0.01 Ma
the Recent Epoch
the Pleistocene Epoch time period
0.01 Ma to 1.5 Ma
The rise and dominance of humans occurred in these epochs
the Recent and Pleistocene Epochs
The Upper Tertiary Period is comprised of these two Epochs
The Pliocene and the Miocene Epochs
Modern animals and plants were common during this time period
the upper Tertiary Period
The Medieval Latin name for WALES
The Cenozoic Era is what percent of the earth's age?
The Oligocene, Eocene and Paleocene Epochs combine to form which time period?
the lower Tertiary Period
The Pliocene Epoch time period is...?
1.5 Ma to 7 Ma
7 to 26 Ma
the Miocene Epoch
The Oligocene Epoch
26 to 38 Ma
38 to 54 Ma
the Eocene Epoch
The time period of the Paleocene Epoch
54 to 65 Ma
5% of Earth's history is which Era?
the Mesozoic Era
Modern mammals, insects and plants developed during this time period
the lower Tertiary Period
The Paleozoic is to Earth's Age as 9 is to...?
The Tertiary Period endured for about...?
65 My
The Cretaceous lasted for about...?
75 My
Primitive mammals, the last dinosaurs and the last ammonites lived during this period:
the upper Cretaceous
During the Lower Cretaceous period these plants arose:
The first birds and mammals arose during this 45 My period:
the Jurassic Period
The 75 My period known as the Carboniferous is comprised of these two periods:
the Pennsylvanian and Mississippian Periods
The Precambrian time is further divided into these two era
the Proterozoic and Archeozoic Era
The first signs of life and Algae occurred during this era
the Proterozoic Era
Precambrian time is about how many years long?
3,000 My
Trilobites evolved during this 50 My time period:
the Cambrian
The Cambrian period included the evolution of the first ? invertebrates.
Currently, the oldest known rocks in the world come from the...?
Acasta area of Canada's Northwest Territories.
The age of the oldest currently known rocks
4041 +/- 12 Ma
Trilobites first appeared during the ? and had their climax in the ?
Cambrian and Ordovician
Trilobites existed for a period of about how many years?
120 My
Many marine invertebrates including fish appeared during the time period known as the...?
The Silurian period was characterised by these widespread reefs
The first land life including scorpions occurred during this period
the Silurian
Lungfish appeared during the
Silurian Period
The first traces of land life occurred during this period
the Silurian
First amphibians and land snails
the Devonian
Primitive land plants appear
the Devonian
A marine animal having a bivalve shell and a pair of appendages coming out of the sides of its mouth
The Greek prefix "brachio-" means
of the arm
The climax of the Brachiopods occurred when?
The Devonian
Primitive ammonites appeared
the Mississippian
Climax of shell crushing sharks
the Mississippian
The first reptiles appear
the Pennsylvanian
A time of amphibians, primitive insects, seed ferns and primitive conifers
the Pennsylvanian
Rise of reptiles. Modern insects. Last of many plant and animal groups.
the Permian
The rise of dinosaurs, cycadlike plants and boney fishes
the Triassic
Primitive, seed-bearing, mostly tropical plants of fernlike or palmlike appearance
First birds, first mammals. Diversification of reptiles; climax of ammonites; coniferous trees
the Jurassic
The rise of flowering plants
the lower Cretaceous
Primitive mammals; last dinosaurs; last ammonites
the upper Cretaceous
Rapid development of modern mammals, insects and plants
the lower Tertiary
Modern animals and plants
the upper Tertiary
The rise and dominance of humans
the Recent
The latin-based adjective meaning "consisting of four" or "fourth in order"
"quaternary" from "quaterni"="by fours"
The Greek words "kainos"="new" and "zoe"="life" combine to form this word
The Latin word "tertius"="third" is the basis for this word
The glacial epoch of northern Asia, Europe and N. America
the Pleistocene
The Greek words "pleistos"="most" and "kainos"="recent" combine to form this word
Gk. pleion=more
when combined =?
The Gk. (meion=less) + (kainos=recent) =?
Gk. (oligos=few)+(kainos=new,recent)=?
Gk (eos=dawn,daybreak)+(kainos=new,recent)=?
Gk. (palaios=old,ancient)+(kainos=new,recent)=?
A mediterranean island where large amounts of chalk occurred
The L. Creta=Crete gave rise to this adjective
The plural of L. jus=law is jura, which inspired which name for an arc of mountains spanning the Swiss-Franco border?
the Jura Mountains
The earliest of the three periods comprised by the Mesozoic era
the Triassic
Gk treis=three is basis for the name for which geological period?
the Triassic
The former E. Russian province "Perm" forms the name-base for which geoperiod?
the Permian
The rocks and fossils first found in SW England at Devon inspired the name of this geoperiod
the Devonian
The pre-Celtic people of ancient SE Wales
the Silures (as adj. = silurian)
An ancient Celtic tribe of Wales
The Ordovices (<L)
The Jurassic Period is named after...?
The Jura Mountains in present-day Swizterland

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