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Author Topic:   Mechanisms of sea transgression and regression
Pressie
Member
Posts: 2098
From: Pretoria, SA
Joined: 06-18-2010
Member Rating: 7.6


Message 11 of 16 (813952)
07-03-2017 5:22 AM
Reply to: Message 1 by Adminnemooseus
04-24-2017 9:04 PM


Adminnemooes writes:

"How did the sea transgressions and regressions of the Earth's geologic history happen"?

Lots of different ways as can be witnessed in my country today.

1. Plate tectonics (splitting of continents, island arcs forming, continents moving, etc. etc).
2. Isostatatic changes.
3. Sea level changes.
4. Climate changes.
5. Inland lakes forming and disappearing.
6. Rivers becoming bigger or smaller.
7. Deserts forming.
8. Erosion.
9. Sedimentation such as big tombolos forming, etc.
10.Etc. Etc

Literally lots of different scenarious. Processes similar to what is happening all over the world today. The present is the key to the past.


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Pressie
Member
Posts: 2098
From: Pretoria, SA
Joined: 06-18-2010
Member Rating: 7.6


Message 12 of 16 (813953)
07-03-2017 5:27 AM
Reply to: Message 3 by Faith
04-26-2017 9:04 PM


Faith writes:

What is "Cretaceous sea floor?"

Sea floor formed during the Cretaceous. I'm not sure why you are asking the question.

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Pressie
Member
Posts: 2098
From: Pretoria, SA
Joined: 06-18-2010
Member Rating: 7.6


Message 13 of 16 (813964)
07-03-2017 7:48 AM
Reply to: Message 9 by Faith
04-28-2017 11:03 AM


Re: Increased Cretaceous seafloor spreading rates
Faith writes:

So, to be clear, is all such dating to time periods done by radiometric methods?

Some. Others not. That's the beauty of it. Lots of different methods provide similar ages.

Edited by Pressie, : No reason given.


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Pressie
Member
Posts: 2098
From: Pretoria, SA
Joined: 06-18-2010
Member Rating: 7.6


Message 14 of 16 (813967)
07-03-2017 8:01 AM
Reply to: Message 9 by Faith
04-28-2017 11:03 AM


Re: Increased Cretaceous seafloor spreading rates
I'm not too sure why you pretend to be interested in the Cretaceous. I mean, you believe that the earth is less than 10 000 years old.

Oh, and Faith. Before you forget. Let's remind you that the Cretaceous in not a "rock layer".

Edited by Pressie, : No reason given.

Edited by Pressie, : No reason given.


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