Dark Lake, Mount Hood National Forest, Estacada, OR, 44.796343 -121.760206 1.433 km el, about 0.7 km wide, 1.533 km high edge to SSW, 100 m higher -- may be many impact features of various sizes -- 13 km S of Sisi Butte --
Sisi Butte 44.899219 -121.844491 1.711 km top el, 1.287 km low at EES, 424 m lower -- directly S is a 1.5 km size round area with a fractal collection of small craters, which show up very clearly on Google Maps Terrain -- perhaps this is good evidence of the impact of a cluster of objects onto the older complex surface, which seems to have a uniform composition without layers -- if this is so, then the question can be raised as to whether much larger objects made Dark Lake and Sisi Butte and more. This fits the paradigm outlined in recent years by Dennis Cox: http://craterhunter.wordpress.com/ Impact melt formation by low-altitude airburst processes, evidence from small terrestrial craters and numerical modeling, H E Newsom & MBE Boslough 2008 Mar 2p abstract: Rich Murray 2010.11.17 http://rmforall.blogspot.com/2010_11_01_archive.htm Wednesday, November 17, 2010 [ at end of each long page, click on Older Posts ] http://groups.yahoo.com/group/astrodeep/message/73 [ you may have to Copy and Paste URLs into your browser ] 3 times more downward energy from directed force of meteor airburst in 3D simulations by Mark B. E. Boslough, Sandia Lab 2007.12.17: Rich Murray 2010.08.30 http://rmforall.blogspot.com/2010_08_01_archive.htm Monday, August 30, 2010 [ at end of each long page, click on Older Posts ] http://groups.yahoo.com/group/astrodeep/message/63 [ you may have to Copy and Paste URLs into your browser ] ______________________________________________ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
