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The mission of the San Mateo County Historical Association is to inspire wonder and discovery
of the cultural and natural history of San Mateo County.

Object Record

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Catalog Number 2014.009.019
Description Buccinum sp., whelk (sea snail) fossil dating from between 1.5 million years ago to .75 million years ago commonly found at low tide in littoral (sandy and muddy bottom) or sub-littoral (open bay, muddy marine) zones. Fossil is snail-shaped, with easily identifiable swirl at one end. Specimen is overall brown in hue, with some reddish patches, likely indicating the presence of iron oxide. Sediment within the shell is visible from underside surface of fossil.
Object Name Shell, Animal
Collection 3D - Paleontology
Title Buccinum sp., Whelk (sea snail) Fossil, 1.5-.75 Ma
Date 1.5 - .75 Ma
Kingdom Animalia (Animals)
Phylum Mollusca (Molluscs)
Class Gastropoda (Snails, limpets)
Order Achatinoidea (Snails)
Family Buccinidae (Whelks)
Genus Buccinum
Species sp.
Inscription Text none
Provenance Fossils taken from Merced Formation collected at Westborough Boulevard at Highway 280 in the late 1970s or early 1980s. (See Yancey 1978, Fig. 2: Artifacts taken from E Stratified Section/D-5929). Most specimens (especially clams) in this collection are not extinct and can still be found in the Bay Area.
Notes Retired Geologist Ken Lajoie identified on 4/24/2014.
Dimensions H-0.875 W-1.375 D-1 inches
Search Terms Fossils
Merced Formation
South San Francisco
Subjects Fossils
Marine biology