Almejas Formation

{{Short description|Geologic formation in Mexico}} {{Infobox rockunit | name = Almejas Formation | image = | caption = | type = Formation | age = Messinian-Zanclean<br />~{{fossil range|7.2|3.6}} | period = Pliocene | prilithology = Sandstone | otherlithology = Conglomerate | namedfor = | namedby = | region = Baja California | country = Mexico | coordinates = | unitof = | subunits = | underlies = | overlies = | thickness = | extent = | area = | map = | map_caption = }}

The '''Almejas Formation''' is a geologic formation in Mexico. It preserves fossils dating back to the Late Miocene to Early Pliocene of the Neogene period.

== Fossil content == Various fossils have been found in the formation:<ref name=FWArroyoDelphin>[https://paleobiodb.org/classic/displayCollResults?collection_no=13090 Arroyo Delphin] at Fossilworks.org</ref>

=== Mammals === {{div col|colwidth=22em}} * ''Aivukus cedrosensis'' * ''Albireo whistleri'' * ''Balaenoptera sp.'' * ''Denebola brachycephala'' * ''Dusignathus santacruzensis'' * ''Parapontoporia pacifica'' * ''Piscolithax boreios'' * ''Piscolithax tedfordi'' * ''aff. Plesiocetus sp.'' * ''Praekogia cedrosensis'' * ''Thalassoleon mexicanus'' {{div col end}}

=== Birds === {{div col|colwidth=22em}} * ''Cerorhinca minor'' * ''Mancalla cedrosensis'' * ''?Megapaloelodus opsigonus'' * ''Morus sp.'' * ''Puffinus tedfordi'' * ''?Synthliboramphus sp.'' {{div col end}}

=== Fishes === {{div col|colwidth=22em}} * ''Carcharodon cf. carcharias'' * ''Carcharhinus sp.'' * Megalodon {{div col end}}

== See also == {{Portal|Earth sciences|Geology|Mexico|Paleontology}} * List of fossiliferous stratigraphic units in Mexico

== References == {{reflist}}

Category:Geologic formations of Mexico Category:Neogene Mexico Category:Sandstone formations Category:Conglomerate formations of Mexico Category:Fossiliferous stratigraphic units of North America Category:Paleontology in Mexico Category:Baja California