[3]A wooden plaque and rock cairn stand at Penguins Bay, on the southern coast of Seymour Island.

The plaque was placed on 10 November 1903 by the crew of the Argentinian Corvette Uruguay on a mission to rescue the members of the Swedish expedition led by Otto Nordenskiöld.

In December 1892[10] when Norwegian Captain, Carl Anton Larsen landed his ship, the Jason, on Seymour Island, he returned with more than maps of the territory, he found fossils of long-extinct species.

[11] During that trip, his ship, the Antarctic, was crushed and sunk by icebergs, and he and his crew were forced to weather fourteen months on the neighboring Snow Hill Island, surviving on penguins and seals.

The Cretaceous-Paleogene boundary (K-Pg) crops out on Seymour Island in the upper levels of the López de Bertodano Formation.

[12] A small (but significant) iridium anomaly occurs at the boundary on Seymour Island, as at lower latitudes, thought to be fallout from the Chicxulub impactor in the Gulf of Mexico.

[13] Directly above the boundary a layer of disarticulated fish fossils occurs, victims of a disturbed ecosystem immediately following the impact event.

[12] Multiple reports have described evidence for climatic changes in Antarctica prior to the mass extinction,[14] but the extent to which these affected marine biodiversity is debated.

Based on extensive marine fossil collections from Seymour Island, recent work has confirmed that a single and severe mass extinction event occurred at this time in Antarctica just as at lower latitudes.

[15] Seymour Island has also been the site of much study of the Eocene Epoch of climatic cooling, a process that culminated in the initiation of Antarctic glaciation.

[16] Seymour Island has been a site of study of many fossils from this particular part of the Eocene Epoch, during which there was a more flourishing ecosystem with diverse biota as a result of the warmer climate.

[20][21][22] In respect of the site being the 'most representative high latitude K-Pg boundary location and one of the most significant and best exposed globally' the 'Cretaceous-Paleogene Transition at Seymour (Marambio) Island' was included by the International Union of Geological Sciences (IUGS) in its assemblage of 100 'geological heritage sites' around the world in a listing published in October 2022.

A shallow recession in the north coast of Seymour Island, 1 nautical mile (1.9 km; 1.2 mi) north-northeast of Cape Lamas.

A valley 2 nautical miles (3.7 km; 2.3 mi) long, trending northeast-southwest in the west part of Seymour Island.

The point was possibly seen in 1843 by a British expedition under James Clark Ross, and was roughly charted by Captain Carl Anton Larsen who landed on the island in 1892 and 1893.

A ridge of exposed dark rock trending west-southwest – east.northeast, located 1.5 nautical miles (2.8 km; 1.7 mi) north of Penguin Point in central Seymour Island.

The descriptive name "Filo Negro" (black ridge) was applied to this feature in Argentine geological reports on the island in 1978.

Probably first seen by Sir James Clark Ross in January 1843, but the cape was not adequately surveyed until 1902-03 when the Swedish expedition under Otto Nordenskjöld wintered in the area.