View source for Progressive chamber

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==Definition==
*''according to Hottinger (2006):''
'''PROGRESSIVE CHAMBER ''' - a chamber with a supplementary, retrovert [[aperture]] giving rise to a supplementary series of chambers (in architectural types with multiple spirals or in orbitoidiform growth following the development of spiral [[nepiont]]s).


==References==
Hottinger (2006), [http://paleopolis.rediris.es/cg/CG2006_M02/index.html Illustrated glossary of terms used in foraminiferal research]. [http://paleopolis.rediris.es/cg/uk-index.html Carnets de Géologie], [http://paleopolis.rediris.es/cg/CG2006_M02/index.html Memoir 2], ISSN 1634-0744                                                              
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