|Description||Cardium nuttalli, Cockle 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 comprised of two scalloped-shaped shells, one shell overlapping another, with ribs extending the entire length of the shells. Overall, light brown in hue, as if packed in dirt. Underside surface contains both shell fragments and small shell casts throughout.|
|Object Name||Shell, Animal|
|Collection||3D - Paleontology|
|Title||Cardium nuttalli, Cockle 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.
Cardium nuttali (Common name: Cockle Shell) are large shells, measuring up to 14 centimeters in length. This species still thrives in the Bay Area.
|Dimensions||H-3.5 W-6.25 D-5.75 inches|
South San Francisco