New Mars Forums

Calliban

Member

From: Northern England, UK

Registered: 2019-08-18

Posts: 3,796

Geology, Mars, Earth and Elsewhere

This forum lacks a general topic on geology.  This thread is raised accordingly.

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"Plan and prepare for every possibility, and you will never act. It is nobler to have courage as we stumble into half the things we fear than to analyse every possible obstacle and begin nothing. Great things are achieved by embracing great dangers."

Calliban

Member

From: Northern England, UK

Registered: 2019-08-18

Posts: 3,796

Re: Geology, Mars, Earth and Elsewhere

Metamorphic rocks have been found on Mars.
https://scitechdaily.com/scientists-fin … nite-mars/

Mars lacks techtonics and its crust is essentially a single plate without subduction zones.  The geothermal gradient also appears to be shallower than that of Earth, with greater depths needed to reach the temperature and pressure needed to drive metamorphic processes.  So metamorphic rock is expected to be rarer on Mars and what does exist was expected to be buried deep within the crust.  However, local metamorphesis can occur due to magma eruption through sedimentary rock.  This provides the heat needed to drive dehydration reactions.  So metamorphic rocks may be found on Mars surface in volcanically active regions.  This is exactly what has been detected.

Last edited by Calliban (2023-11-30 01:37:27)

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"Plan and prepare for every possibility, and you will never act. It is nobler to have courage as we stumble into half the things we fear than to analyse every possible obstacle and begin nothing. Great things are achieved by embracing great dangers."

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,433

Re: Geology, Mars, Earth and Elsewhere

For Calliban re new topic !!!

Thanks for creating a topic for this important branch of knowledge!

I did a quick Google lookup:

Global web icon
National Geographic Society
https://www.nationalgeographic.org/ency … phic-rocks
Metamorphic Rocks - National Geographic …
WebMetamorphic rocks are rocks that change from one type of rock to another due to pressure, heat, and time. Learn how metamorphic rocks form, what conditions are required, and what types of metamorphic rocks exist. See examples of metamorphic rocks such as gneiss, …

(th)

SpaceNut

Administrator

From: New Hampshire

Registered: 2004-07-22

Posts: 29,433

Re: Geology, Mars, Earth and Elsewhere

This reminds me of the Companion fo Mars Expedition Number One; 17 crew members
crew make up for exploration