Showing posts with label Triassic Period. Show all posts
Showing posts with label Triassic Period. Show all posts

Monday, May 1, 2023

420 Mya to 300 Mya: Including the Devonian Period

420 Mya to 300 Mya   Mya means million years ago.

 


419.2 Mya to ca 360 Mya, Earth: The Devonian period of the the Paleozoic era. This period has been divided to early, middle, and late parts. the late part ending in a mass extinction event.


251.9 Mya to 201.3, Triassic:This is the first geological of the Mesozoic Era. The Triassic falls between the Permian and Jurassic Periods. At this time a first evidence of mammals was seen, a mouse size critter. This geologic period ended with a mass extinction of species.










                                                                                                                    rcs


Saturday, September 4, 2021

300,000,000 BP to 280,000,000 BP

 300,000,000 to 280,000,000 BP




298.9 Mya, Cisuralian, Asselian: The firs true mosses, beetles and flies evolve.
Marine flourish in warm shallow seas.



295 Mya, Cisuralian, Sakmarian: Coal age flora are being replaced by cone-bearing gymnosperms, the first true seed plants


290.1 Mya, Cisuralian, Artinskian: Amphibians are common. Cone bearing flora appearing.


283.5 Mya, Paleozoic, Permian, Cisuralian, Kungurian: Parareptiles and temnospondyl amphibians are common. 




 

 

 

        












251,900,000 BP to 201,300,000 BP: Triassic Period: This time has been called the Triassic Period. The Triassic Period falls after the Permian Period and before the Jurassic Period. First evidence of mammals appear, a mouse like critter is found to lie within the Period. This geologic period ended with a mass extinction of species.



Monday, April 26, 2021

200 Mya to 180 Mya

 200 Mya to 180 Mya
usage notes: Mya points to "millions of years ago I referens to "before the present;"
 
 
 

 200 Mya: Pangea existed as present continents united.
200 Mya to 145 Mya: This is the duration of the Jurassic geological Period. The Jurassic Period fell between the Triassic and Cretaceous Periods,
~ The super continent Pangaea began to drift apart during this Period.
~ There was lots of life, wet climate, and lush vegetation. Many new dinosaurs appeared. Conifers appeared. Mammals were common, but small. There is evidence of early birds and lizards, our first evidence of them.
~ There was a "minor"extinction toward the end of this period.
200,000,000 BP: At this very beginning of the Jurassic Period
Pangea exists. Present continents become defined but are still united. 
 
201,000,000 BP to 152,000,000 BP: Jurassic Period: This period was been divided into the Early, Middle, and Late Jurassic. The Early Jurassic is made up of four ages: the Hettangia, the Sineemurian,, the Pliensbachisan, and the Toarcian. We have begun a geological timeline. I'll add that there were already some small mammals around at this early age,