However, the skiway and 'ramp' to the station from the plateau have all become so unstable that the Chilean Air Force (FACh) have ceased operating there.
During the Mesozoic, the Antarctic Peninsula was the site of an active volcanic arc, with deposition of a fore-arc basin sequence.
Included in that sequence is a 2–3 km succession of turbiditic coarse sandstones and volcanic rocks, exposed on the eastern portion of the Adelaide Island, which correlate with the Upper Jurassic-Lower Cretaceous Fossil Bluff Group on Alexander Island.
The Early Cretaceous Milestone Bluff Formation (113.9 Ma) is a sandstone-conglomerate indicating a shallowing trend.
Finally, the Adelaide Island Intrusive Suite (45-52 Ma) are granodiorite-gabbro hybrid plutons with minor dolerite dykes.
[4] On the island's east coast, Landauer Point, marks the west side of the north entrance to Tickle Channel.
The point was named by the UK Antarctic Place-Names Committee (UK-APC) for Joseph K. Landauer, an American physicist.
About 2 nmi (3.7 km) south is Rothera Point, marking the east side of the Ryder Bay.
[8][9] The point is protected as Antarctic Specially Protected Area (ASPA) No.129 so that it would serve as a biological research site and control area against which the environmental impact of the adjacent Rothera Research Station could be monitored in an Antarctic fellfield ecosystem.
Its name appears on a Chilean government chart of 1947, from "sorpresa", a Spanish word meaning "surprise".
[15] This article incorporates public domain material from websites or documents of the United States Geological Survey.