January 27, 2011
Micro Features
north to the left LRO-WAC image processed by Brendan Shaw
Brendan processed LRO WAC images showing this area of Mare Imbrium just north of Helicon and LeVerrier.
There are a number of interesting small features to explore here, but first notice the broad scale difference in
surface smoothness. In the annotated image below a horizontal line is the boundary between rough textured
lava and a smoother surface below the line. Because this boundary is so straight it is probably a difference in
processing of the LRO image, but there do seem to be fewer craters below the line. If it is real it is the edge
between a younger lava unit and an older, rougher surface one. Nearly all of the interesting features here are
above the line. For example, Brendan circled two objects. To the left is a crater that doesn't look like the
normal impact craters. It has a very low rim and a shallow interior. Probably it is a normal impact crater that
was overwhelmed by lava flows. The second circle on the right marks a more peculiar feature. It is circular
with pit in its center - it looks like a squashed dome, or a Cheerio encrusted with lava. It also is similar to the
oddity discussed Chuck Wood
Related Links
Rükl plate 10
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