The geology of Alexander Island (Antarctic Peninsula): a new 1:500 000 geological map
Riley, Teal R. 
ORCID: https://orcid.org/0000-0002-3333-5021; MacDonald, David I.M.; Cantrill, David J.; Crame, J. Alistair ORCID: https://orcid.org/0000-0002-5027-9965; Curtis, Michael L..
2025
The geology of Alexander Island (Antarctic Peninsula): a new 1:500 000 geological map.
Antarctic Science.
20, pp.
10.1017/S0954102025100321
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Abstract/Summary
We present a new 1:500 000 geological map of Alexander Island of West Antarctica. The map, combined with recent detrital zircon analysis, defines an updated chronostratigraphy for the Fossil Bluff Group, a Late Jurassic–Cretaceous forearc succession > 8 km in thickness that represents one of the most complete forearc successions globally. The forearc succession overlies and is in faulted contact with the LeMay Group, a late Permian basement accretionary complex that forms part of an extensive array of late Permian accretionary complexes in West Gondwana. The LeMay Group is intruded and overlain by a succession of Late Cretaceous–Palaeogene intermediate to silicic volcanic rocks and granitoid plutons. The uppermost unit on Alexander Island is an episode of Neogene to Quaternary basaltic volcanism associated with ridge-trench collisions and slab window development.
| Item Type: | Publication - Article |
|---|---|
| Digital Object Identifier (DOI): | 10.1017/S0954102025100321 |
| ISSN: | 1365-2079 |
| Additional Information: | Map freely available to download via Related URL link. |
| Additional Keywords: | Antarctica; forearc; lithostratigraphy; Mesozoic; volcanic; sedimentary |
| NORA Subject Terms: | Earth Sciences |
| Related URLs: | |
| Date made live: | 25 Sep 2025 08:01 +0 (UTC) |
| URI: | https://nora.nerc.ac.uk/id/eprint/539507 |
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