|Description||Panopea generosa, geoduck 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 oval-shaped. Top and bottom shells of clam are still attached at the ligament. Growth rings are visible, but not easily detected due to its uneven surface. Overall reddish hue indicates the likely presence of iron oxide. Band of dark brown across the middle of the specimen is sediment between the shells.|
|Object Name||Shell, Animal|
|Collection||3D - Paleontology|
|Title||Panopea generosa, Geoduck Clam Fossil, 1.5-.75 Ma|
|Date||1.5 - .75 Ma|
|Order||Myoida (Saltwater clams)|
|Family||Hiatellidae (Small saltwater clams)|
|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.
Panopea generosa (Common name: Geoduck Clam) still thrives in the Bay Area.
|Dimensions||H-1.625 W-3.5 D-1.75 inches|
South San Francisco