New England hotspot
The New England hotspot, also referred to as the Great Meteor hotspot and sometimes the Monteregian hotspot, is a
Geologic history
The geologic history of the New England hotspot is the subject of much debate among geoscientists. The conventional opinion is that volcanic activity associated with the hotspot results from movement of the
Evidence for a plume origin includes the above age progression, seismic anomalies in the lower mantle under the Great Meteor Seamount (though these do not extend into the upper mantle as expected for a plume),[5][6] and helium isotope ratios in groundwater in the Monteregian Hills which indicate a deep mantle source.[7] The lack of an obvious hotspot track west of Montreal has previously been ascribed to failure of the plume to penetrate the Canadian Shield, a lack of recognizable intrusions due to erosion, or strengthening of the plume when it approached the Monteregian Hills,[1][8] but more recent research has found kimberlite fields in Ontario and New York dated between 180 and 134 Ma and at Rankin Inlet to the northwest of Hudson Bay dated between 214-192 Ma which may represent an older, continental extension of the hotspot track.[9]
Some evidence, such the lack of an initial flood
See also
References
- ^ .
- ^ hdl:1912/5785.
- ^ ISBN 0-521-80604-6.
- ^ .
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- ISBN 978-4-431-55359-5.
- S2CID 225328667.
- doi:10.1139/e95-109.
- .
- ^ a b McHone, J.G. (1996). "Constraints on the mantle plume model for Mesozoic alkaline intrusions in northeastern North America". The Canadian Mineralogist. 34 (2): 325–334.
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- ^ .
- ^ .
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