USGS M1690, Point Año Nuevo (Pleistocene of the United States)

Where: San Mateo County, California (37.1° N, 122.3° W: paleocoordinates 37.1° N, 122.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Late/Upper Pleistocene (0.1 - 0.0 Ma)

• From exposure of terrace deposit. The wave-cut platform is directly overlain by a stratum of fossiliferous sand and sandy gravel that reaches a maximum thickness of 2-3 feet. The fossiliferous stratum is overlain, locally, by light-gray to tan fine sand. Cut into massive siltstone (Monterey Fm).

• bed-level stratigraphic resolution

Environment/lithology: coastal; unlithified, pebbly, shelly/skeletal sandstone

• A Pleistocene terrace shellbed, hence transgressive.
• Fossiliferous sand and sandy gravel.

Size class: macrofossils

Reposited in the UCMP, USNM

Collection methods: bulk, quarrying, sieve,

• Figured material at USNM; unfigured specimens formerly at USGS Menlo Park (now UCMP)

Primary reference: W. O. Addicott. 1966. Late Pleistocene marine paleoecology and zoogeography on Central California. United States Geological Survey Professional Paper 523-C:1-27 [A. Miller/A. Hendy/M. Clapham]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 37672: authorized by Austin Hendy, entered by Austin Hendy on 20.03.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Detailed and representative for macrofossil taxa
Echinoidea
 Camarodonta - Strongylocentrotidae
Strongylocentrotus sp. Brandt 1835 sea urchin
Gastropoda
 Heterostropha - Pyramidellidae
 Lepetellida - Fissurellidae
Puncturella galeata Gould 1846 puncturella
Puncturella multistriata Dall 1914 puncturella
Diodora cf. aspera Rathke 1833 snail
 Trochoidea - Trochidae
Calliostoma cf. ligatum Gould 1849 top snail
 Trochoidea - Turbinidae
Pupillaria pupilla Gould 1849 snail
 Opisthobranchia - Cylichnidae
Cylichna attonsa Carpenter 1864 snail
 Patellida - Lottiidae
Acmaea sp. Eschscholtz 1830 limpet
 Patellida - Lepetidae
 Cerithioidea - Cerithiidae
Bittium eschrichti cerith snail
 Neotaenioglossa - Calyptraeidae
Crepidula cf. nummaria Gould 1846 slipper shell
Calyptraea fastigiata Gould 1846 slipper shell
 Epitonioidea - Epitoniidae
Epitonium indianorum Carpenter 1864 wentletrap
 Sorbeoconcha - Littorinidae
"Lacuna carinata" = Lacuna (Epheria) carinata, "Lacuna solidula" = Lacuna (Epheria) carinata, "Lacuna porrecta" = Lacuna (Epheria) porrecta
"Lacuna carinata" = Lacuna (Epheria) carinata Gould 1848 periwinkle
"Lacuna solidula" = Lacuna (Epheria) carinata Gould 1848 periwinkle
Subspecies: Lacuna solidula compacta
"Lacuna porrecta" = Lacuna (Epheria) porrecta Carpenter 1864 periwinkle
Subspecies: Lacuna porrecta exaquata
 Sorbeoconcha - Naticidae
Polinices sp., "Cryptonatica clausa" = Cryptonatica affinis
Polinices sp. Monfort 1810 moon snail
"Cryptonatica clausa" = Cryptonatica affinis Gmelin 1791 moon snail
 Sorbeoconcha - Cerithiopsidae
 Sorbeoconcha - Rissoidae
 Sorbeoconcha - Capulidae
 Neogastropoda - Columbellidae
Amphissa columbiana Dall 1916 snail
Mitrella tuberosa Carpenter 1864 snail
 Neogastropoda - Nassariidae
"Nassarius fossatus" = Caesia fossatus, "Nassarius mendicus" = Hima mendica
"Nassarius fossatus" = Caesia fossatus Gould 1849 snail
"Nassarius mendicus" = Hima mendica Gould 1849 snail
 Neogastropoda - Buccinidae
"Trophonopsis multicostatus" = Neptunea (Trophonopsis), Searlesia dira
"Trophonopsis multicostatus" = Neptunea (Trophonopsis) true whelk
Searlesia dira Reeve 1846 true whelk
 Neogastropoda - Conidae
"? Oenopota fidicula" = Propebela fidicula, ? Oenopota tabulata
"? Oenopota fidicula" = Propebela fidicula Gould 1849 cone shell
 Neogastropoda - Olividae
"Olivella biplicata" = Callianax biplicata, "Olivella cf. pedroana" = Callianax pedroana
"Olivella biplicata" = Callianax biplicata Sowerby 1825 olive snail
"Olivella cf. pedroana" = Callianax pedroana Conrad 1855 olive snail
 Neogastropoda - Muricidae
Thais lamellosa, "Ocenebra interfossa" = Paciocinebrina interfossa, "Ocenebra lurida" = Paciocinebrina lurida, "Ocenebra tenuisculpta" = Ocinebrina tenuisculpta, Stramonita sp.
Thais lamellosa Gmelin 1791 murex snail
"Ocenebra interfossa" = Paciocinebrina interfossa Carpenter 1864 murex snail
"Ocenebra lurida" = Paciocinebrina lurida Middendorff 1848 murex snail
Subspecies: Ocenebra cf. lurida aspera
"Ocenebra tenuisculpta" = Ocinebrina tenuisculpta Carpenter 1866 murex snail
Stramonita sp. Schumacher 1817 murex snail
 Sorbeoconcha - Ranellidae
Fusitriton oregonensis Redfield 1846 triton shell
Bivalvia
 Mytilida - Mytilidae
Adula cf. diegensis Dall 1911 datemussel
Mytilus cf. edulis Linnaeus 1758 mussel
Subspecies: Mytilus edulis glomeratus
 Pectinida - Pectinoidae
"Chlamys herica" = Chlamys hastata, "Chlamys pugetensis" = Chlamys hastata
"Chlamys herica" = Chlamys hastata Sowerby 1842 scallop
"Chlamys pugetensis" = Chlamys hastata Sowerby 1842 scallop
 Cardiida - Lasaeidae
"Mysella cf. tumida" = Kurtiella tumida
"Mysella cf. tumida" = Kurtiella tumida Carpenter 1864 clam
 Cardiida - Cardiidae
"Clinocardium nuttallii" = Clinocardium (Clinocardium) nuttallii
"Clinocardium nuttallii" = Clinocardium (Clinocardium) nuttallii Conrad 1837 cockle
[entered as Clinocardium nuttalli]
 Cardiida - Tellinidae
"Tellina buttoni" = Ameritella modesta, "Macoma expansa" = Rexithaerus expansa, "Macoma inquinata" = Macoma (Macoma) inquinata
"Tellina buttoni" = Ameritella modesta Carpenter 1864 tellin clam
"Macoma expansa" = Rexithaerus expansa Carpenter 1864 tellin clam
"Macoma inquinata" = Macoma (Macoma) inquinata Deshayes 1855 tellin clam
 Cardiida - Veneridae
"Protothaca staminea" = Leukoma staminea, Saxidomus giganteus, "Transennella tantilla" = Nutricola tantilla
"Protothaca staminea" = Leukoma staminea Conrad 1837 venus clam
Saxidomus giganteus Deshayes 1839 venus clam
"Transennella tantilla" = Nutricola tantilla Gould 1853 venus clam
 Cardiida - Mactridae
Tresus capax Gould 1850 clam
 Pholadida - Myidae
"Mya truncata" = Mya (Mya) truncata
"Mya truncata" = Mya (Mya) truncata Linnaeus 1758 softshell clam
 Pholadida - Pholadidae
Zirfaea pilsbryi Lowe 1931 clam
Penitella penita Conrad 1837 clam
 Solenida - Pharidae
Siliqua aff. patula Dixon 1789 clam
 Hiatellida - Hiatellidae
Hiatella sp. Daudin 1801 clam
Polyplacophora
 Neoloricata - Mopaliidae
Mopalia cf. lignosa Gould 1846 chiton
Thecostraca
 Balanomorpha - Balanidae
Balanus cf. nubilus Darwin 1854 barnacle
Balanus rostratus Hoek 1883 barnacle
Subspecies: Balanus rostratus alaskiensis
Balanus crenatus Bruguière 1789 barnacle
Anthozoa
 Scleractinia - Dendrophylliidae
Balanophyllia elegans Verrill 1864 stony coral