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List of fossiliferous stratigraphic units in Colombia
Several
stratigraphic units
in
Colombia
have provided
fossils
.
The richest
formations
are the
Devonian
Cuche
and Floresta Formations, the
Cretaceous
Paja Formation
, the
Paleocene
Cerrejón Formation
and the
Miocene
La Venta site
. The
latter
is
the richest
Konzentrat-Lagerstätte
in
northern
South America
and comprises the formations of the
Honda Group
.
Fossiliferous stratigraphic
units
Formations are
ordered
according to their
youngest
age
Proposed reclassification of
South American
gomphotheres
Some authors,
Lucas
, Mothé, Avilla
et al
., propose a reclassification of
the South
American
gomphotheres as follows:
Stegomastodon
is an exclusively
North American
genus
Haplomastodon
is a South American genus, but synonymous with
Notiomastodon
as
Notiomastodon
was
defined earlier
, all
Haplomastodon
species should be considered part of
Notiomastodon
all formerly described species as
Stegomastodon sp.
,
Haplomastodon sp.
and
Notiomastodon sp.
belong to a single species;
Notiomastodon platensis
Cuvieronius
is the only remaining South American genus outside of
Notiomastodon
Evolution
Lucas proposes that
Notiomastodon
evolved from
Cuvieronius
inside South
America
Mothé
et
al. propose that
Notiomastodon
and
Cuvieronius
reached
South America in two separate migration waves
Pleistocene-Holocene
Cocinetas
Basin
Honda Group
Bogotá
Formation
Cerrejón Formation
La Frontera
Formation
Paja Formation
Murca
Formation
Jurassic
Cuche & Floresta Formations
Cambro-Ordovician
Other formations
South American gomphotheres
*