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X-WR-CALNAME:EAPS Department Lecture Series - Maureen Long (Yale)
X-WR-TIMEZONE:Eastern Time (US & Canada)
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DTSTAMP:20260517T063612Z
UID:tag:localist.com\,2008:EventInstance_3892156
DTSTART:20180912T200000Z
DTEND:20180912T210000Z
DESCRIPTION:"The Appalachians and how they got that way: New insights into 
 the structure and dynamics of eastern North America from the EarthScope pr
 oject" Speaker: Maureen Long (Yale) The surface geology of eastern North A
 merica is extraordinary in its complexity. This complexity reflects a wide
  range of tectonic processes that have operated in the region over the pas
 t billion years\, including episodes of subduction and rifting associated 
 with two complete Wilson cycles of supercontinent assembly and breakup. It
  is poorly known\, however\, how the deep crust and mantle lithosphere hav
 e responded to these tectonic forces over time\; furthermore\, the persist
 ence of Appalachian topography through time remains a major outstanding pr
 oblem in the study of landscape evolution. The deployment of the EarthScop
 e USArray in eastern North America has opened up new frontiers in the stud
 y of the deep structure and dynamics of the crust\, mantle lithosphere\, a
 nd asthenospheric mantle beneath this passive continental margin. In this 
 talk I will discuss recent results from the EarthScope project on the stru
 cture of the crust and upper mantle beneath eastern North America\, with a
  focus on the central Appalachians and on New England. I will present new 
 results from the MAGIC project\, a multidisciplinary collaboration that in
 cludes a USArray Flexible Array deployment across the central Appalachians
  in Virginia\, West Virginia\, and Ohio. We find evidence for lithospheric
  loss beneath the MAGIC study region\, along with evidence for lithospheri
 c deformation associated with orogenesis and rifting. We have also identif
 ied a prominent eastward-dipping intracrustal feature beneath Ohio and Wes
 t Virginia\, which may represent the relict Grenville deformation front at
  depth. Beneath New England\, USArray data are shedding light on the chara
 cteristics and origin of a low-velocity anomaly in the upper mantle\, whic
 h may correspond to an edge-driven convection cell. About this Series Week
 ly talks given by leading thinkers in the areas of geology\, geophysics\, 
 geobiology\, geochemistry\, atmospheric science\, oceanography\, climatolo
 gy\, and planetary science. Lectures take place on Wednesdays from 3:45pm 
 in MIT Building 54 room 915\, unless otherwise noted.
GEO:42.360158;-71.089183
LOCATION:Building 54\, 915/923
SUMMARY:EAPS Department Lecture Series - Maureen Long (Yale)
URL;VALUE=URI:https://calendar.mit.edu/event/eaps_department_lecture_series
 _-_maureen_long_yale
CATEGORIES:Conferences/Seminars/Lectures
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