juz' wondering
2007-07-07 16:19:38 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
Lost of things really, but that time period (maybe not as late as 2.8 depending on what you read) is noted as a time when the Earth's atmosphere began to change from a reducing atmosphere (no oxygen) to a oxidizing one (oxygen). Now there are differing opinions on how much oxygen there was and how fast it built up but there are some great papers on it. use Google Scholar to find some especially by D.E. Canfield (esp the Homage to Robert M. Garrels) and H.D. Holland.
These guys talk a lot about the evidence in the rock record like banded iron formations and paleosols (to name a few)
2007-07-07 16:28:10 · answer #1 · answered by Lady Geologist 7 · 2⤊ 0⤋
Comet Elenin is a extremely small comet an prolonged way off, which will make a closest concepts-set to Earth of twenty-two million miles interior the autumn. The video is the manufactured from yet another crackpot like the fool who expected the international could end final week. Elenin replaced into not commonly used in 1965--it replaced into got here upon in trouble-free terms some months in the past, yet in 1965 it replaced into plenty extra away than it is now. No comet could reason a disruption till it actual hits. Laxall's Comet, case in point, wandered in between Jupiter and its Galilean moons. The comet had its orbit batted around like a billiard ball, yet there replaced into no measurable effect on any of the moons. The tsunami replaced into led to by using plates moving, not by using any cosmic merchandise.
2016-11-08 10:47:56 · answer #2 · answered by tahir 4 · 0⤊ 0⤋
Geolisous is right..
until that happened, not much about the surface of land had personality..it was just dirt and wind and not much else ..
2 'billion' years ago the planet was bardly cooled off to the point where an atmosphere COULD develop..
But like some one has said.. it's still being pondered by scientist s....the question is still up for debate...we have theories...that's all.
2007-07-10 15:29:16 · answer #3 · answered by olddogwatchin 5 · 0⤊ 0⤋
I don't know, but I did hear that there was an ice age that happened millions or even billions of years ago the wiped out the dinosours although some people said that a comit hit to, but we don't know what happened then because we wasn't there. Hey, for all we know they could have been able to walk to and talk and build a rocket and went to another plant and fosuls could have been the toys that they play with lol lol, but I doubt that.
2007-07-11 16:57:00 · answer #4 · answered by Animal-luva4242 3 · 0⤊ 0⤋
the world was wondering what will happen in the next 2.8 Billion Years Later
2007-07-07 16:41:06 · answer #5 · answered by kimht 6 · 0⤊ 1⤋
No one can really know, for sure. Scientist have theories, but that is it. Only theories, nothing concrete. Actually, they change their conclusions from time to time.
2007-07-12 07:35:42 · answer #6 · answered by Sunshine 4 · 0⤊ 0⤋
Really, think about it....do you REALLY think scientists can figure that out? They change their minds about dinosaurs every 10 years or so.........
2007-07-07 16:22:34 · answer #7 · answered by Anonymous · 0⤊ 1⤋
eh who knos , lets just worry bout now ok
2007-07-07 16:27:38 · answer #8 · answered by Anonymous · 0⤊ 1⤋
U and I not yet born.
2007-07-07 23:42:11 · answer #9 · answered by jason 4 · 0⤊ 1⤋