Impact melt rocks from the Late Paleocene Hiawatha impact structure, northwest Greenland. 27MAY2023

Impact melt rocks from the Late Paleocene Hiawatha impact structure, northwest Greenland.

More on the Late Paleocene Hiawatha impact structure, northwest Greenland. It was once thought to be a possible Pleistocene impact.

Hyde, W.R., Garde, A.A., Keulen, N., Malkki, S.N., Jaret, S.J., Waight, T., Beck, P., McDonald, I. and Larsen, N.K., 2023.
Impact melt rocks from the Late Paleocene Hiawatha impact structure, northwest Greenland. Meteoritics & Planetary Science.
https://orca.cardiff.ac.uk/id/eprint/159598/4/maps.13987.pdf

https://orca.cardiff.ac.uk/id/eprint/159598/

Yours,

Paul H.

A Possible Second Large Subglacial Impact Crater in Northwest Greenland 14FEB2019

 A Possible Second Large Subglacial Impact Crater in Northwest Greenland

Scientist May Have Discovered Massive Crater

Under Greenland Ice Sheet, Daily Beast, Feb. 2019

https://www.thedailybeast.com/scientist-may-have-discovered-massive-crater-under-greenland-ice-sheet

Photos: Craters Hidden Beneath the Greenland

Ice Sheet, Live Science, February 12, 2019

https://www.livescience.com/64755-photos-greenland-craters.html

The open access paper is:

Joseph A. MacGregor, William F. Bottke, Jr.,  Mark

A. Fahnestock, Jeremy P. Harbeck, Kurt H. Kjær,

John D. Paden, David E. Stillman, and Michael

Studinger, 2019, A Possible Second Large

Subglacial Impact Crater in Northwest Greenland

First published: 11 February 2019

https://doi.org/10.1029/2018GL078126

https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2018GL078126

The paper states:

"Based on the dated radiostratigraphy of the Greenland

Ice Sheet, available for pre-2014 radar data only, the

ice overlying the structure is at least 79 ka old (Figures

1e–1h; MacGregor et al., 2015)."

Yours,

Paul H.