QUARTER 3 DINOSURS Flashcards
The longest time unit in the GTS
Eons
The term was coined in 1972 by geologist Preston Cloud.
Hadean eon
The period was later classified as the Priscoan period by W. Brian Harland.
Hadean Eon
The time period of this Eon is 4.6 to 4 Billion years ago
Hadean Eon
The atmosphere of this eon is Hot, thick, steamy, and full of dust and crud. Made up of mostly carbon dioxide and water vapor, with traces of nitrogen and smelly sulfur compounds.
Hadean Eon
The Geology of this Eon is Covered with oceans of liquid rock, boiling sulfur, and impact craters.
Hadean Eon
The Life forms of this eon are Small amounts of organic carbon has been found that probably may be an evidence of first life on earth.
Hadean Eon
Reason why this eon ended because of the cooling of the earth’s temperature.
Hadean Eon
It was first used in 1872, Which means “the earliest geological age”
Archean Eon
The time period of this eon is between 4 to 2.5 BYA
Archean Eon
The atmosphere of this eon is Comprised methane ammonia, and other gases.
Archean Eon
The atmosphere of this eon is Most of the carbon dioxide have been chemically changed into limestone and deposited at the bottom of the ocean.
Archean Eon
The geology of this eon are Formation of the continental shield rock, Small “island” land masses floated in the molten “seas.” And Start of the formation of oceans
Archean Eon
The geology of this eon are Water from comets and hydrated minerals condensed in the atmosphere and fell as torrential rain, cooling the planet and filling the first oceans with liquid water.
Archean Eon
The life forms of this eon are Microscopic prokaryotes such as photosynthetic bacteria, (Cyanobacteria) Stromatolites, Single-celled archaea extremophiles
Archean Eon
What eon did Life began in the oceans about 3.5 billion to 2.8 billion years ago. (
Archean Eon
The oldest fossils ever found in Archean eon (3.5 bya). Are layered bio-chemical accretionary structures that formed in shallow water by the trapping, binding, and cementation of sedimentary grains of microorganisms.
Stromatolites
The time period of this eon is 2.5 GA to 541 MA
Proterozoic Eon
The atmosphere of this eon is Mostly nitrogen, with a little water vapor and carbon dioxide. With Free oxygen released by cyanobacteria
Proterozoic Eon
The geology of this eon is Formation of supercontinents: Rodinia and Frequent movement of earth surface ( Plate Tectonics) and continental collisions.
Proterozoic Eon
The life forms of this eon are 1.7 GA - Appearance of single celled eukaryotes.
511 MA - appearance of multicellular organism. And still only found in the ocean
Proterozoic Eon
During Proterozoic Eon the GREAT OXYGENATION EVENT happens which cause the
Extinction of many anaerobic bacteria
It belongs to the Proterozoic Eon and its Approximately 635 million to 541 million years ago
Autotrophs and soft-bodied heterotrophs
The Ediacaran Period
The first fossil presented in the ppt in The Ediacaran period
Ediacaran biota - Charnia
The second fossil presented in the ppt in The Ediacaran period
Ediacaran biota- Dickinsonia
Caused by a 250 million year lull in volcanic activity. This caused a decrease in the carbon dioxide of the atmosphere resulting in a climate cool down
Snowball earth
The term “phanerozoic” was first introduced by the American geologist George Halcott Chadwick (1876–1953).
Phanerozoic Eon
Because it was once believed that the life began in Cambrian, the first period of the
Phanerozoic Eon
The time period of this eon is 541 MA to present
Phanerozoic Eon
The Phanerozoic eon is the eon of abundant complex life.
It is the eon we are living in.
Phanerozoic Eon
In the Phanerozoic Eon it is divided into 3 era
Paleozoic Era
Mesozoic Era
Cenozoic Era
The term ‘Paleozoic’ has been derived from Greek words: palaios meaning ‘ancient’ and zoe meaning ‘life’
Marks the beginning of life on our planet.
It was the period of early life where plants, corals, mollusks, insects, fish, and many other living organisms emerged.
Paleozoic Era
The time period of this era is 542 – 252 MA
Paleozoic Era
The atmosphere of this era is Nitrogen, oxygen, carbon Dioxide and other trace gases
Paleozoic Era
The geology of this era is Formation of continents Formation of mountain chains, formation of coal beds. Earth’s surface experienced a lot of activity, including shifting of tectonic plates,
Paleozoic Era
The climate of this era is There are extreme shifts in climate in each era
Paleozoic Era
The life forms of this era are Invertebrates (animals without backbones) such as corals, brachiopods, mollusks, and arthropods such as trilobites ruled the oceans in the early and middle parts of the Paleozoic. However Vertebrates (including fish, amphibians, and reptiles) began to flourish in the later Paleozoic.
Paleozoic Era
60% of invertebrates in the oceans and seas became extinct.
May be triggered by volcanic eruptions (Paleozoic era)
Late Ordovician Mass Extinction
Permian-Triassic Mass Extinction
most severe extinction in our planet’s history
(Paleozoic era)
THE GREAT DYING EVENT
This eon is 253 to 66 million years ago
Mesozoic Eon
The geology of this eon is Separation of the supercontinent Pangaea
Mesozoic Eon
The climate is warm throughout the triassic and jurassic period but towards the middle of the cretaceous period the climate became warmer.
Then global cooling occurred at the end of the Mesozoic
Mesozoic Eon
The life forms of this eon is Appearance of dinosaurs, birds, plants, and mammals
Mesozoic Eon
At the end of the Mesozoic, the Cretaceous-Tertiary Mass Extinction occurred.
This was the extinction event that killed the dinosaurs (among others).
(Notable event of Mesozoic era)
The K-Pg Event
The time period is 67 million years ago to present
Cenozoic era
