Punta Gorda [Esmeraldas Fm]: Early Pliocene, Ecuador

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Scaphopoda - Dentaliida - Dentaliidae
Gastropoda - Lepetellida - Fissurellidae
new species
Gastropoda - Opisthobranchiata - Cylichnidae
Scaphander sp. Monfort 1810
Gastropoda - Neotaenioglossa - Calyptraeidae
Calyptraea sp. Lamarck 1799
Gastropoda - Epitoniidae
Scalina ferminiana (Dall 1908)
Gastropoda - Vermetidae
Serpulorbis sp. Sasso 1827
Gastropoda - Neogastropoda - Mitridae
Gastropoda - Neogastropoda - Buccinidae
new species
new species
new species
new species
new species
new species
new species
new species
new species
new species
Northia (Northia) northiae (Gray in Griffith & Pidgeon 1833)
Gastropoda - Neogastropoda - Fasciolariidae
new species
new species
Gastropoda - Neogastropoda - Columbellidae
new species
new species
Gastropoda - Neogastropoda - Nassariidae
new species
new species
Gastropoda - Neogastropoda - Costellariidae
new species
Gastropoda - Neogastropoda - Cancellariidae
new species
new species
new species
new species
new species
Gastropoda - Neogastropoda - Turridae
new species
new species
new species
Polystira oxytropis (Sowerby 1834)
ecuadoriana new subspecies
Gastropoda - Neogastropoda - Cochlespiridae
reevi
Gastropoda - Neogastropoda - Conidae
new species
new species
Gastropoda - Neogastropoda - Borsoniidae
new species
Gastropoda - Neogastropoda - Raphitomidae
new species
Gastropoda - Neogastropoda - Clathurellidae
new species
Gastropoda - Neogastropoda - Pseudomelatomidae
new species
new species
new species
Gastropoda - Neogastropoda - Volutidae
new species
new species
Gastropoda - Neogastropoda - Muricidae
new species
new species
new species
Gastropoda - Xenophoridae
Gastropoda - Ranellidae
Gastropoda - Cassidae
new species
    = Semicassis centiquadrata Valenciennes 1832
Beu 2010
Gastropoda - Personidae
Gastropoda - Bursidae
    = Bursa rugosa Sowerby 1835
Landau and Marques da Silva 2010
Gastropoda - Tonnidae
Malea ringens (Swainson 1822)
Gastropoda - Ficidae
new species
Gastropoda - Capulidae
new species
Gastropoda - Naticidae
burica
new species
Sinum lacondamini Olsson 1964
new species
Gastropoda - Turritellidae
Turritella sp. Lamarck 1799
Bivalvia - Arcida - Arcidae
new species
Bivalvia - Arcida - Limopsidae
Bivalvia - Pectinida - Pectinidae
new species
Bivalvia - Pectinida - Anomiidae
Placunanomia cumingii Broderip 1832
[entered as Placuanomia cumingii]
Anomia peruviana d'Orbigny 1846
Bivalvia - Pectinida - Limidae
new species
Bivalvia - Ostreida - Ostreidae
Bivalvia - Carditida - Carditidae
Bivalvia - Lucinida - Lucinidae
Bivalvia - Cardiida - Tellinidae
new species
Bivalvia - Cardiida - Cardiidae
new species
Trachycardium (Phlogocardia) belcheri (Broderip and Sowerby 1829)
Bivalvia - Cardiida - Chamidae
Arcinella arcinella (Linnaeus 1767)
cf. arcinella subspecies
Bivalvia - Cardiida - Veneridae
Bivalvia - Nuculida - Nuculidae
new species
Bivalvia - Solemyida - Nucinellidae
Nucinella cf. subdolus (Strong and Hertlein 1937)
Bivalvia - Nuculanida - Nuculanidae
see common names

Geography
Country:Ecuador State/province:Manabi
Coordinates: 1.0° North, 79.7° West (view map)
Paleocoordinates:1.3° North, 78.6° West (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period: Neogene Epoch: Pliocene
Stage: Zanclean 10 m.y. bin: Cenozoic 6
Key time interval: Early Pliocene
Age range of interval: 5.333 - 3.6 m.y. ago
Stratigraphy
Formation:Esmeraldas
Stratigraphic resolution:formation
Stratigraphy comments: AGE: Stated to be Late Miocene in text; Early Pliocene following Beu (2010). COMMENTS: Thought to be equivalent to the Borbon formation of the Rio Santiago section, resting unconformably on top of conglomerate beds containing Turritella altilira and other Miocene fossils probably not greater than 300 meters in thickness overlain unconformably by massive to wellbedded brown sandstones

The beds at Quebrada Camarones have a low notherly to nearly horizontal dip, the cutbanks showing bare exposures sometimes rising as high as 30 feet
Lithology and environment
Primary lithology:fine,brown,yellow lithified sandstone
Secondary lithology: lithified sandstone
Includes fossils?Y
Lithology description: thin bedded to massive tuffaceous mudstones sometimes with interbeds of soft sandstones. small or medium-sized rounded pebbles are scattered throughout the formation, or more rarely concentrated into minor beds or seams of conglomerate. Large calcareous concretions, some rounded or with an irregular rootlike shape, generally with hollow centers are common at many places. The beds are highly foraminiferal, with pelagic types, often pure enough to form a foraminiferal oozelike sediment. On the fresh surface of the rock platform, the formation is hard, and of a gray-black or dark olive-green color. In this locality, fossils are found in a lens of rubble with angular chunks of hard shale or mudstone, polished pebbles of hard rocks with pieces of carbonized wood and crushed walnut.
Environment:marine indet.
Geology comments: deep water fauna with a few shallow water forms that were badly worn, indicating transportation, while deep-water fauna were in perfect condition, suggesting turbidity currents.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:all microfossils,some macrofossils
Reason for describing collection:general faunal/floral analysis
Metadata
Database number:60772
Authorizer:A. Miller, A. Hendy Enterer:K. Bulinski, A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2006-05-22 20:01:20 Last modified:2025-02-22 15:12:02
Access level:the public Released:2006-05-22 20:01:20
Creative Commons license:CC0
Reference information

Primary reference:
17422. A. A. Olsson. 1964. Neogene Mollusks From Northwestern Ecuador [A. Miller/K. Bulinski]

Secondary references:

30037 A. G. Beu. 2010. Neogene Tonnoidean Gastropods of Tropical and South America; contributions to the Dominican Republic and Panama Paleontology Projects and Uplift of the Central American Isthmus. Bulletins of American Paleontology (377-378)1-550 [A. Hendy/A. Hendy/A. Hendy]
36423 B. Landau and C. Marques da Silva. 2010. Early Pliocene gastropods of Cubagua, Venezuela: Taxonomy, palaeobiogeography and ecostratigraphy. Palaeontos 19:1-221 [A. Hendy/A. Hendy]