Planetary geomorphology is used to try to explain the Moons Ocean of Storms (Oceanus Procellarum) but there are a number of very different theories as to how this massive lunar mare was formed.
Each formation theory seems to completely change how the Moon itself was initially formed and what happened to it over time.
You have a huge asteroid impact, the Moons internal heating and cooling, volcanic rifts, and a smaller companion Moon to the main Moon impacting into the Moon.
Science was surprised by what the NASA GRAIL spacecrafts found when measuring and mapping the Moons gravity.
What they found was not what was expected: A series of long, narrow features that look like rift structures, places where the Moon’s crust is thinner, and which are generally associated with upwelling magma. The structures form a rough square or pentagon that neatly outlines the lowlands.
This changes the way they interpret the formation of Procellarum. Instead of a single huge impact, these rifts formed and magma started to seep (or more likely flood) through.
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These different theories also have to change how the planetary geomorphology of the Moon is interpreted.
This unnamed rille (0.141°N, 295.362°E), roughly 1 km across, is located on the edge of the southwestern region of Oceanus Procellarum. As the mare deposits that formed Oceanus Procellarum cooled and contracted, fracture systems developed along the mare-highlands boundary. Near this boundary, loading of denser basalts (mare) over less dense crustal materials (highlands) results in tectonic stresses that can cause rock to pull apart along fractures, forming arcuate rilles.
A rille to rover over near Rimae Hevelius
Any theory that can perhaps explain these features needs to be considered. Especially a geology theory that is based on experiments that can be replicated in the science lab. The Electric Universe theory has seems to show that craters and rilles can be created by electromagnetic processes such as EDM (Electric Discharge Machining).
The EU geology theory also can perhaps explain why the same features are found on very different objects.
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