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Baker, Christensen - Coggle Diagram
Baker
formations
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channels, valleys, massive polygons
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channel: trough-like, contains evidence of flows from regional collapse
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glaciers
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glaciers started wasting, but sublimation slowed by debris, leading to sustained flow of ice
conditions
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north pole has ice caps
water sublimates in spring-summer, condensing at south pole, with the reverse occurring during the other seasons
Christensen
other discoveries
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warm, wet planets should have carbonate
mars does not, therefore oceans most likely were short-lived
hematite sites, show definite evidence of past oceans
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lava
mars comprised mostly by pyroxene, olivine, basalt
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