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Author
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Topic: Apollo 15: Rectangular rock in photographs
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Apolloman
Member Posts: 152
From: Ledignan, Gard (30), France
Registered: Mar 2009
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posted 01-06-2016 08:54 AM
   
I need geological information about this rock on photos (rectangular/flat rock station 9a) during Apollo 15. At first glance, it appears to put to me as such on the regolith without bedrock. Is any debris (collapse theory lava tube). Here the little that I could find (from "Exploring the Moon: The Apollo Expeditions" by David Harland): On his way back, he spotted a rectangular half-metre rock with a distinctly layered structure; it was too large to sample, so he [Irwin] snapped a picture for the record. Anyone have it more information on this rock? |
Larry McGlynn
Member Posts: 1267
From: Boston, MA
Registered: Jul 2003
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posted 01-06-2016 05:51 PM
Just talked with Dave Scott. He has contacted Jim Head about the rock in the photo. His preliminary comment is that the rock is rille bedrock that was thrown up by a secondary impact. More to come. |
MCroft04
Member Posts: 1647
From: Smithfield, Me, USA
Registered: Mar 2005
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posted 01-06-2016 08:03 PM
OK, since Larry has the big guys working on this I'm going to venture a guess. The surface of the rock looks vesicular; if so it is likely a basalt. The layering could be different lava flows. But I don't know why it is rectangular shaped. On earth this is common due to joints, fractures in the rocks (without any offset like a fault) due to regional stresses. I'm not aware of any joints on them moon; I would venture that there are none. |
Apolloman
Member Posts: 152
From: Ledignan, Gard (30), France
Registered: Mar 2009
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posted 01-07-2016 01:57 PM
Larry, thank you for this initial response, I look forward to have more information. | |
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