|Description||Saxidomus nuttalli, California butter clam 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 specimen is intact, with top and bottom shells still attached at ligament. Growth lines are easily visible. Overall hue is reddish-brown, indicating the likely presence of iron oxide.|
|Object Name||Shell, Animal|
|Collection||3D - Paleontology|
|Title||Saxidomus nuttalli, California Butter Clam Fossil, 1.5-.75 Ma|
|Date||1.5 - .75 Ma|
|Order||Veneroida (bivalve order)|
|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.|
Retired Geologist Ken Lajoie identified on 4/8/2014.
Saxidomus nuttalli (Common name: California Butter Clam) still thrives in the Bay Area.
|Dimensions||H-1.375 W-3.25 D-2.25 inches|
South San Francisco