History Of Life On Earth Flashcards
A system of chronological measurement that relates to stratigraphy to time
Geologic time scale
Danish physician
Nicholas steno
Three main principles that underlie the interpretation of geologic time
The principle of superposition.
The principle of horizontality.
The principle of original lateral continuity.
Time of hidden life
( age of early life )
Precambrian
Fossils discovered 560 MYA in South australia
Coronacollina acula
Mars size planetoid
Theia
Stick strands of cyanobacteria trap sediment from the ocean and form visible mounds called ……
Stromatolites
Paleazoic era is also known as….
Old life
What is the supercontinent on the proterozoic eon?
Rodinia
Paleozoic era is also known as
Old life
This is the explosion of life
Cambria period
All existing phyla came into being at this time
Cambrian
This is the time where the 1st animals with bone appear and a very cold time in earth’s history
Ordovician period
Four main continents in ordovician period
Gondwana, baltica, Laurentia, Siberia
What period and what jawless fish called
Ordovician period and Agnatha
First land plants and land animals appear on this time
Silurian period
(1)What period was first millipede and Sea scorpions appeared and (2)what are these things called?
Silurian, eurypterids
The earliest well developed circulatory system
( vascular plants ) known as
Cooksonia
A primitive armoured fish
Romundina
Three northern continents collide to form the new supercontinent called
Euramerica
Known as age of fish
Devonian period
Amphibians, evergreens and ferns appear at this time
Devonian period
Warm moist climate conditions
Carboniferous period
The evolution of first reptiles took place with the development of…..
Amniotic egg
Known as the coal age
Carboniferous period
The formation of coal deposits of coal in plant debris formed what?
World’s first extensive coal deposits
Meaning of the word carboniferous
Coal-bearing
Pangea forms: the reptiles spread across the continents
Permian period
Two major reptiles in permian period
Diapsids ( gave rise to dinosaurs )
Synapsids ( gave rise to mammals )
Periods of paleozoic era
Cambrian, ordovician, silurian, devonian, carboniferous and permian
The middle life
Mesozoic era
This time is the age of reptiles
Mesozoic era
What period in mesozoic era did the first dinosaur appear
Triassic period
First turtle fossil found on this period
Triassic period
It’s the golden age of dinosaurs
Jurassic period
First birds appear
Jurassic period
The climate here is very hot and dry
Jurassic period
Deciduous trees and grasses were common on this period of mesozoic era
Cretaceous period
First flowering plants
First primates and snakes appear
Cretaceous period
The recent life
Cenozoic era
Age of mammals and age of flowering plants
Cenozoic era
Three periods of cenozoic era
Paleogene, neogene, and quaternary
Age of humans
Quaternary period
Two epochs of quaternary
Holocene and pleistocene
The evolution of hominids and apes
Neogene
The solar system was forming within a cloud of dust and gas known as….
Solar nebula
