Mathematics – Logic
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..513h&link_type=abstract
Lunar and Planetary Science, volume 27, page 513
Mathematics
Logic
2
Festoon, Magma: Silicic, Ovda Regio, Tertiary Crust, Tesserae
Scientific paper
Tertiary crust forms by the reprocessing of primary and secondary crusts by several possible mechanisms; according to Taylor the Earth's continental crust is the only presently known example of tertiary crust. One of the most distinctive morphologic volcanic signatures of evolved crust on Earth is the presence of steep-sided domes that form from the extrusion of viscous magma. Features of similar morphology have been observed on the Moon and Venus, and at least one occurrence on Venus may be linked to more evolved composition. We have been analyzing several environments and candidates for tertiary crust on Venus, specifically asking several questions, including: What is the evidence for post-formational evolution of tessera in terms of melting of thickened crustal roots and associated volcanism of potentially non-basaltic composition? Here we report on the characteristics, setting, stratigraphic position and preliminary assessment of the petrogenesis of the distinctive festoon deposit lying within some of the highest-standing tessera in Ovda Regio.
Head James W.
Hess Paul C.
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