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3 - The Ferrar Dolerite Sills

Published online by Cambridge University Press:  17 February 2023

Bruce Marsh
Bruce Marsh
Affiliation:
Johns Hopkins University
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Summary

The Ferrar dolerites form an interconnected stack of four massive sills that in various places breakout to the surface, erupting lavas and volcaniclastics. They are massive horizontal sheets, emplaced when the massive Gondwana continent broke up some 180 million years ago. Somewhat similar, but much less well exposed, systems are found throughout the world, including Eastern North America. The entire system was formed in less than about 500,000 years and other expressions of the system are exposed over some 4,000 km, reaching all the way west to South Africa.

Keywords

Sill NatureGeology MapSill OccurenceSill StyleClimbing ContactsAge of Magmatism
Type
Chapter
Information
Magmatism in the McMurdo Dry Valleys, Antarctica , pp. 84 - 89
Publisher: Cambridge University Press
Print publication year: 2023

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  • The Ferrar Dolerite Sills
  • Bruce Marsh, Johns Hopkins University
  • Book: Magmatism in the McMurdo Dry Valleys, Antarctica
  • Online publication: 17 February 2023
  • Chapter DOI: https://doi.org/10.1017/9781009177078.004
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  • The Ferrar Dolerite Sills
  • Bruce Marsh, Johns Hopkins University
  • Book: Magmatism in the McMurdo Dry Valleys, Antarctica
  • Online publication: 17 February 2023
  • Chapter DOI: https://doi.org/10.1017/9781009177078.004
Available formats
×

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  • The Ferrar Dolerite Sills
  • Bruce Marsh, Johns Hopkins University
  • Book: Magmatism in the McMurdo Dry Valleys, Antarctica
  • Online publication: 17 February 2023
  • Chapter DOI: https://doi.org/10.1017/9781009177078.004
Available formats
×