Jeffries Bluff

	Jeffries Bluff
	Geographical location
Coordinates	73 ° 20 ′ S , 60 ° 19 ′ W Coordinates: 73 ° 20 ′ S , 60 ° 19 ′ W
location	Palmerland , Antarctic Peninsula
coast	Lassiter coast
Waters	Weddell Sea
Waters 2	Mossman Inlet

The Jeffries Bluff is a frozen headland at the Lassiter Coast of Palmer Lands on the Antarctic Peninsula . It forms the southern branch of the Kemp Peninsula and marks the northeast boundary of the entrance to Mossman Inlet .

Participants of the United States Antarctic Service Expedition (1939–1941) photographed them from the air in December 1940. Scientists from the Ronne Antarctic Research Expedition (1947-1948) carried out on-site surveys in November 1947 in collaboration with the Falkland Islands Dependencies Survey . Additional aerial photographs were taken by the United States Navy between 1965 and 1967 . The UK Antarctic Place-Names Committee named them in 1981 after Margaret Elsa Deacon (née Jeffries, 1903-1966), who was on the staff of the British Discovery Investigations in the 1930s .

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