Melovatskaya Formation
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The Melovatka or Melovatsskaya Formation is a
Cenomanian The Cenomanian is, in the ICS' geological timescale, the oldest or earliest age of the Late Cretaceous Epoch or the lowest stage of the Upper Cretaceous Series. An age is a unit of geochronology; it is a unit of time; the stage is a unit in the s ...
geologic
formation Formation may refer to: Linguistics * Back-formation, the process of creating a new lexeme by removing or affixes * Word formation, the creation of a new word by adding affixes Mathematics and science * Cave formation or speleothem, a secondar ...
in
Russia Russia (, , ), or the Russian Federation, is a List of transcontinental countries, transcontinental country spanning Eastern Europe and North Asia, Northern Asia. It is the List of countries and dependencies by area, largest country in the ...
.
Pterosaur Pterosaurs (; from Greek ''pteron'' and ''sauros'', meaning "wing lizard") is an extinct clade of flying reptiles in the order, Pterosauria. They existed during most of the Mesozoic: from the Late Triassic to the end of the Cretaceous (228 to ...
fossils have been recovered from the formation.


Description

The two phosphorite horizons are separated in places by a yellowish sand interbed up to 1 m thick; however, they sometimes merge into a single horizon. The lower interbed or part of the integrated phosphorite horizon shows in places straight diagonal bedding, which is manifested in the orientation of almost flat pellets, pebbles, and pseudomorphs on bivalve shells. The phosphate concretions are irregular aggregates and rounded pebbles, ranging in size from several millimeters to 5–10 cm. They are dark brown or nearly black.


Fossil content

The following vertebrate fossils were reported from the formation:Melovatka 3
at
Fossilworks Fossilworks is a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals ...
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* '' Cerebavis cenomanica'' * '' Cretolamna appendiculata'' * '' Edaphodon sedgwicki'' * '' Elasmodectes kiprijanoffi'' * '' Elasmodus sinzovi'' * '' Eostriatolamia subulata'' * '' Ischyodus latus'' * ''
Paraorthacodus recurvus ''Paraorthacodus'' is an extinct genus of cartilaginous fish. An unidentified species has been found in the Hasle Formation of Bornholm, Denmark ) , song = ( en, "King Christian stood by the lofty mast") , song_type = National and royal ...
'' * '' Pseudoisurus denticulatus'' * '' Synechodus dispar'' * '' Lonchodectes sp.'' * '' Odontaspis sp.'' * '' Polyacrodus sp.'' * '' Squatina sp.'' * '' ?Platypterygius sp.'' * Chelonioidea indet. * Chimaeridae indet. * Elasmosauridae indet. * Enchodontidae indet. * Ornithocheiroidea indet. * Osteichthyes indet. * Pliosauridae indet.


See also

* List of pterosaur-bearing stratigraphic units *
List of fossiliferous stratigraphic units in Russia References

* {{DEFAULTSORT:Fossiliferous stratigraphic units in Russia Geologic formations of Russia, . Paleontology in Russia, . Fossiliferous stratigraphic units of Asia, Russia Fossiliferous stratigraphic units of Europe, Russia R ...
** Sekmenevsk Formation


References

{{Reflist Geologic formations of Russia Cretaceous Russia Cenomanian Stage Sandstone formations Phosphorite formations Paleontology in Russia Geology of European Russia Geography of Volgograd Oblast