Earth Sciences 1086F/G Lecture Notes - Lecture 9: Pyroxene, Tempel 1, Feldspar
13 Oct 2017
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1. 0 introduction: named after roman god is the first rock from sun" and has no natural satellites and is small. It stays in the same region as the sun (making it hard to see from earth). 2. 1 orbital chaos: 1880 discovered it was tidally coupled to the sun, just as the moon is to the earth (resonance). 3. 3 craters and plains, cliffs and hallows: unlike moon, mercury has cliffs that are 100 km long and thought to be faults. Volcanic deposits covers 40% of the surface, some as a result of explosive eruptions: the largest basin is the caloris basin which is multi-ringed 1300 km in diameter with mountain rings 3 km high. It is marked by craters less than 15 km in diameter and secondary craters reduced by chunks of ejecta from larger impacts. This requires high volatile elements in crust; they are recent.
