Minna Bluff is a prominent, ice‑covered volcanic bluff situated on the southern margin of the Ross Ice Shelf in Antarctica. The feature extends roughly north–south for about 40 km (25 mi) and rises approximately 400 m (1,300 ft) above the surrounding ice surface. Its coordinates are approximately 78°30′ S latitude and 166°30′ E longitude.
Geographically, Minna Bluff forms a natural barrier between the Ross Ice Shelf and the Antarctic Plateau, influencing the flow of ice and acting as a landmark for overland traverses and scientific expeditions in the region. The bluff is part of the McMurdo Volcanic Group, a suite of Cenozoic volcanic rocks that underlie much of the Ross Sea sector. The exposed portions of the bluff consist mainly of basaltic to andesitic lava flows and breccias, overlain by a thick mantle of snow and firn.
The feature was named by the British National Antarctic Expedition (1901–04) led by Robert Falcon Scott. Contemporary expedition records indicate that the name commemorates the Norwegian sealing vessel Minna, which operated in Antarctic waters during the early 20th century.
Minna Bluff lies within the Ross Dependency, a sector claimed by New Zealand, and is relatively close (approximately 70 km) to McMurdo Station, the United States’ primary research facility on the continent. Although no permanent structures exist on the bluff itself, it has been used as a reference point for glaciological and geological surveys, including ice‑core drilling projects that assess the dynamics of the Ross Ice Shelf.
The climate of the area is characterized by extreme cold, with mean annual temperatures well below –30 °C (–22 °F), persistent katabatic winds, and minimal precipitation, primarily in the form of snowfall. Seasonal variations are limited, and the region experiences continuous daylight during the austral summer and polar night during the winter months.
Because of its strategic location and distinctive topography, Minna Bluff continues to be a subject of scientific interest, particularly in studies of Antarctic ice‑sheet stability, volcanic geology, and climate history.