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Meteor crater near Marathon

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Offline marufo

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Re: Meteor crater near Marathon
« Reply #1 on: September 30, 2019, 01:15:32 PM »
More info here:
https://www.utpb.edu/ceed/geology-resources/west-texas-geology/sierra-madera-astrobleme/index
https://impactcraters.us/sierra_madera_texas
It was only determined to be a crater in the early 1960's as lunar geology studies were really getting underway...
https://pubs.geoscienceworld.org/gsa/gsabulletin/article-abstract/83/9/2795/7682/structure-of-sierra-madera-texas-as-a-guide-to?redirectedFrom=fulltext
... and Apollo astronauts trained there in 1972.
Quote
March 14-15, '72 Sierra Madera Astronauts: Cernan, Schmitt, Parker, Irwin
Geologists: Wilshire, Jackson, Morrison, Phinney, Freeman, Sutton,
Ulrich
This is an eroded impact structure in limestones and other sedimentary rocks. The exercise utilized a backroom with
Parker as CapCom and Irwin acted as one of the scientists. There was one walking and one riding traverse both
of which started near the crater rim and proceeded towards the central peak.
Mar. 13: 1:00 pm: Logistics personnel go over traverses and plan for locations of their gear.
Mar. 13: 8:00 pm: Briefing on nature of geology from aerial photos and problems that are suggested. All discussion
of the geology emphasized that the mapped units are interpretations only and need to be verified or reinterpreted
by the crew during the traverses. Also details of the logistics for all participants.
Mar. 14: At 7:00 am radio and backroom personnel leave for backroom area and Grover crew leaves for LM site to
erect LM and get Grover ready. At 7:20 am equipment personnel leave for LM site. Start four hour and 30
minute exercise at 8:00 am with LM window description followed by sampling and photography at LM site.
Crew started on riding traverse consisting of seven stations over 5 km to accomplish coring, trenching, sampling,
raking, photography, special sampling, and descriptions. A radio debriefing followed the traverse. Ride
through debriefing of the traverse with crew, observers, backroom personnel. Logistics personnel leave to set
up sites for following day.
Mar. 14: 8:00 pm: Briefing similar to previous night.
Mar. 15: At 7:00 am radio and backroom personnel leave for backroom area. At 7:10 crew, observers, and
equipment personnel leave for LM site. Start four hour and 10 minute EVA at 8:00 am with LM window
description followed by sampling and photography at LM site. Crew had walking traverse of eight stations over
about 2 km with similar tasks as previous day. A radio debriefing followed the traverse. Talk on the geology of
Sierra Madera during lunch followed by two hour walk-through debriefing for crew, observers, backroom
personnel.

 


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