Precambrian environment (Introduction)
There was lots of oxygen before the Cambrian explosion 2 billlion years ago. Why did it take until 540 million years ago to happen? No one knows.-http://www.sciencedaily.com/releases/2013/10/131018132205.htm
Complete thread:
- Precambrian environment -
David Turell,
2012-09-27, 15:54
- Precambrian environment -
David Turell,
2013-05-23, 21:29
- Precambrian environment -
dhw,
2013-05-24, 12:52
- Precambrian environment -
David Turell,
2013-05-24, 15:15
- Precambrian environment -
dhw,
2013-05-25, 11:36
- Precambrian environment -
David Turell,
2013-05-28, 02:47
- Precambrian environment -
David Turell,
2013-10-28, 14:26
- Precambrian environment -
dhw,
2013-10-29, 19:48
- Precambrian environment -
David Turell,
2013-10-29, 21:46
- Precambrian environment -
dhw,
2013-10-30, 18:58
- Precambrian environment -
David Turell,
2013-10-31, 17:32
- Precambrian environment -
dhw,
2013-11-01, 12:53
- Precambrian environment -
David Turell,
2013-11-01, 14:56
- Precambrian environment -
dhw,
2013-11-02, 20:09
- Precambrian environment -
David Turell,
2013-11-03, 01:08
- Precambrian environment -
David Turell,
2013-11-03, 01:09
- Precambrian environment -
David Turell,
2015-08-05, 14:39
- Precambrian environment: rangeomorphs - David Turell, 2015-08-05, 22:15
- Precambrian environment -
David Turell,
2015-08-05, 14:39
- Precambrian environment -
David Turell,
2013-11-03, 01:09
- Precambrian environment -
David Turell,
2013-11-03, 01:08
- Precambrian environment -
dhw,
2013-11-02, 20:09
- Precambrian environment -
David Turell,
2013-11-01, 14:56
- Precambrian environment -
dhw,
2013-11-01, 12:53
- Precambrian environment -
David Turell,
2013-10-31, 17:32
- Precambrian environment -
dhw,
2013-10-30, 18:58
- Precambrian environment -
David Turell,
2013-10-29, 21:46
- Precambrian environment -
dhw,
2013-10-29, 19:48
- Precambrian environment -
David Turell,
2013-10-28, 14:26
- Precambrian environment -
David Turell,
2013-05-28, 02:47
- Precambrian environment -
dhw,
2013-05-25, 11:36
- Precambrian environment -
David Turell,
2013-05-24, 15:15
- Precambrian environment -
dhw,
2013-05-24, 12:52
- Precambrian environment -
David Turell,
2013-05-23, 21:29