LPI Seminar Series
Effective January 1, 2011, LPI seminars will be held on Fridays.
LPI seminars are held from 3:30–4:30 p.m. in the Lecture Hall at USRA, 3600 Bay Area Boulevard, Houston, Texas. Refreshments are served at 4:30 p.m. For more information, please contact Nicolas LeCorvec (phone: 281-486-2118; e-mail: firstname.lastname@example.org) or Francesca Scipioni (phone: 281-486-2108; e-mail: email@example.com). A map of the Clear Lake area is available here. This schedule is subject to revision.
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- Friday, September 4, 2015 - Lecture Hall, 3:30 PM
Adrian Lenardic, Rice University
Plate Tectonics in Time and Space
The paleomagnetic record, available from oceanic lithosphere, shows that plate tectonics has operated relatively smoothly over the last 150-200 million years of our planets evolution. Data based records extending deeper in geologic time, although not as conclusive, do suggest that the pace of tectonics has changed over our planets geologic lifetime. The observational constraints that are currently available are consistent with the hypothesis that plate tectonics operated in a sporadic ("episodic") mode in the precambrian. Geodynamic models indicate that this type of temporal transition can occur under hotter internal conditions for the early earth (associated with greater radiogenic heating). The combined interpretation of geologic data sets and geodynamic modeling based inferences has implications for understanding: 1) The temporal pace of tectonics over our planets geologic lifetime; 2) Potential tectonic regime transitions over Earth history; and 3) The potential for plate tectonics on other terrestrial planets, both in and beyond our own solar system. I will review the pertinent data, the models that suggest the plausibility of temporal changes in the pace and/or mode or tectonics, and the implications for Earth history and comparative planetology.
- Friday, September 18, 2015 - Lecture Hall, 3:30 PM
Patricia Craig, Lunar Planetary Institute