Leonard Frank Spath FRS[1] (20 October 1882 – 2 March 1957) was a British geologist specialising in malacology and ammonitology.
[2] Spath Creek on Ellesmere Island is named after him, and indirectly the Spathian substage of the Early Triassic epoch.
Spath was elected a Fellow of the Royal Society (FRS) in 1940,[1] his certificate of election reads: Attached to the Department of Geology in the British Museum (Nat Hist) for research on the fossil Cephalopoda (Ammonoids and Nautiloids) and the arrangement of that collection; and generally consulted by palaeontologists and Institutions for identifying fossils in these groups.
Has formulated original and clarifying theories of the phylogenetic relations of the Cephalopoda in general and of the Jurassic and Cretaceous ammonites in particular.
His work has resulted in many important elucidations of inter-continental stratigraphical correlation and has done much to advance precise geological knowledge.