July 4, 2013
Tongues And Bumps
image by Ramón García Durán, Barcelona, Catalonia, Spain
Do you see the massive tongue sticking out into Mare Imbrium? From the curve of the Apennines near Aristarchus to the opposite bounding curve of the mare ridges, mountain chains and ejecta debris all near Plato, there is nothing but smooth mare. Except for the tongue near Archimedes. The mountainous part is named the Archimedes Mountains, and an unnamed slightly elevated and bumpy area extends further out into the mare. All of this, like the little string of hills in front of the Apennines facing Wallace, resulted from a giant landslide. When the Apennine rim of the Imbrium impact basin was formed, by both fallback of ejecta and uplift, apparently parts of the mountain scarp facing the deep, not yet lava-flooded, basin floor collapsed in monumental piles*. When the Mare Imbrium lava finally came it flowed around the older topography, and in this area was not thick enough to cover the hills and bumpy stuff. There must have been many other interesting things on the Imbrium Basin's floor, but they are all submerged by a frozen ocean of rock.
- Some of the Archimedes Mountains also may be old, none-mare volcanism that erupted on the basin floor.
2013-07-01, 5 videos mosaic, 03:30 UT (average time). Newton 8" (China :) f/5 (f/15 with Barlow 3X) Lumenera Infinity2 color camera (at the
moment I have no other better camera, sorry, the crisis in Spain is absolutely real :( Autostakkert 2, Astra Image (Lucy Richardson
21st Century Atlas charts 18 & B6.
Yesterday's LPOD: Landform Types
Tomorrow's LPOD: A Tongue & a Bench