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Fossils Identified in Sabzevar
31 August 2006
(CAIS) -- Archeologists and Paleozoologists
believe that fossils found in a village
near the city of Sabzevar in northeastern Khorasan
province belong to marine animals with bivalve shells.
Announcing this, director general of Sabzevar Cultural
Heritage, Handicrafts and Tourism Department said
brachiopod is the scientific term used to refer to these
marine invertebrates which have bivalve dorsal and ventral
shells enclosing a pair of tentacles, arm like structures
that are used to sweep minute food particles into the
Brachiopods lived about two billion years ago in a
mountain located in Babalangar village of Khoushab
district in northwestern Sabzevar, Ali Aldaghi according
to ISNA Persian Service.
He explained that sea creatures including lampshell, reefs
and sponge were killed en masse due to lack of oxygen in a
time between 150 and 200 million years ago and their
remains were turned into fossils.
Also, an official in charge of archeological programs of
the department, Mohammad Abdollahzadeh Sani, stated that a
group comprising the departments experts and biologists
from Sabzevar Instructor Training University has studied
the fossils since 2005.
He added that the research findings would be announced in
the near future.
earliest unequivocal brachiopods in the fossil record
occur in the early Cambrian, with the hingeless,
inarticulate forms appearing first, followed soon
thereafter by the hinged, articulate forms. Putative
brachiopods are also known from much older upper
Neoproterozoic strata, although the assignment remains
uncertain. Brachiopods are extremely common fossils
throughout the Paleozoic. The major shift came with the
Permian extinction. Before this extinction event,
brachiopods were more numerous and diverse than bivalve
mollusks. Afterwards, in the Mesozoic, their diversity and
numbers were drastically reduced, and they were largely
replaced by bivalve mollusks. Mollusks continue to
dominate today, and the remaining orders of brachiopods
survive largely in fringe environments of more extreme
cold and depth.
From/Source: Iran Daily
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