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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 2014.009.027
Description Scutellaster sp., sand dollar 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. Partial specimen of sand dollar is light beige overall. Cross-section shows slightly darker sediment from inside. Underside surface of fossil has raised markings, resembling veins.
Object Name Shell, Animal
Collection 3D - Paleontology
Title Scutellaster sp., Sand Dollar Fossil, 1.5-.75 Ma
Date 1.5 - .75 Ma
Kingdom Animalia (Animals)
Phylum Echinodermata (Echinoderms)
Class Echinoidea (Urchins)
Order Clypeasteroida (Sea urchins)
Family Echinarachniidae (Sand dollars)
Genus Scutellaster
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 4/8/2014.
Dimensions H-0.5 W-3 D-1.5 inches
Search Terms Fossils
Merced Formation
Shellfish
South San Francisco
Subjects Fossils
Marine biology
Shellfish
Shells