Owen Thomas Jones, FRS[1] FGS (16 April 1878 – 5 May 1967) was a Welsh geologist.
He was born in Beulah, near Newcastle Emlyn, Cardiganshire, the only son of David Jones and Margaret Thomas.
In 1896 he went up to University College, Aberystwyth, to study physics, graduating in 1900.
[1][3] In 1903 he joined the British Geological Survey, working near his home in Carmarthenshire and Pembrokeshire.
[4] He dedicated his working life to the study of Welsh geology.