Mathematics – Logic
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..415g&link_type=abstract
Lunar and Planetary Science, volume 27, page 415
Mathematics
Logic
Accretion, Collision Tectonics, Highlands, Tellus Regio, Tesserae
Scientific paper
The ongoing study of Venus utilizing Magellan data has served to stress the importance of tessera terrain in the history of the planet. Mapping analyses have show that in the vast majority of cases tesserae are stratigraphically older than the widespread volcanic plains, however the distribution of craters on tesserae yield a surface age that is statistically indistinguishable from the average age of the planet of approximately 300 Ma. Students of Venus are forced to reconcile these observations that seem to require a Venus that went from a planet capable of producing the heavily deformed tessera highlands to a planet that erupted volcanic plains over the majority (>80%) of her surface within a time that is short relative to the cratering rate. Thus the structures in the tesserae and their relationship to adjoining plains are the most detailed record available of the events that took place during this era of global resurfacing. Additionally, although the morphology of the terrains from the first 80%-90% of the lifetime of Venus was destroyed in this 300 Ma global resurfacing event, rocks from these terrains are certainly included in the tesserae. Detailed study of the tesserae is required to address the many unanswered questions about the formation, evolution and distribution of tesserae and their role in the geologic evolution of Venus.
Gilmore Martha S.
Head James W.
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