The Gram Formation is a

geological formation A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics ( lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exp ...

Gram, Denmark Gram (german: Gramm) is a town with a population of 2,521 (1 January 2022),fossils A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in ...

dating from the

Miocene The Miocene ( ) is the first geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recen ...

period Period may refer to: Common uses * Era, a length or span of time * Full stop (or period), a punctuation mark Arts, entertainment, and media * Period (music), a concept in musical composition * Periodic sentence (or rhetorical period), a concept ...

. The formation consists of three layers: the

glauconite Glauconite is an iron potassium phyllosilicate ( mica group) mineral of characteristic green color which is very friable and has very low weathering resistance. It crystallizes with a monoclinic geometry. Its name is derived from the Greek () m ...

-rich, the Gram Clay, and the Gram sand. The sediments in the formation were deposited in an open marine depositional environment known as the Gram Sea.

Fossil content

Many fossils of new species have been discovered in the formation, including those of the beaked-whale ''Dagonodum mojnum'' and the mollusk species Pseudocochlespira gramensis, as well as specimens of better-known species such as ''Carcharodon megalodon''.

References

Geologic formations of Denmark Miocene Series of Europe Tortonian Shale formations Shallow marine deposits Paleontology in Denmark {{Denmark-geo-stub

Fossil content

See also

References