Upper Aptian calcareous algae from Padurea Craiului (Northern Apuseni mountains, Romania)

Title (Dublin Core)

Description (Dublin Core)

A study of calcareous strata previously assigned to the Barremian-Early Aptian interval in the northwestern part of P?durea Craiului, (Apuseni Mountains), led to the identification of a micropaleontological association indicative of a Late Aptian age. Unequivocal evidence for the Late Aptian assignment of these limestones is the presence throughout the sequence of two orbitolinid species, Mesorbitolina texana (ROEMER) and Mesorbitolina subconcava (LEYMERIE). The most interesting sections are located in the neighbourhood of Subpiatr?, where both outcrops and a quarry facilitated detailed analyses. In this area, the Upper Aptian succession consists basically of three types of macrofacies: 1, limestone with rudists; 2, limestone with Bacinella and 3, limestone with corals, each of them showing several types of microfacies. Bacinella structures are the most common feature in the whole succession, irrespective of the macrofacies. This paper focuses on an algal association that was identified in several levels within the succession. Dasycladalean algae are more frequent, and are commonly found in grain-dominated fabrics (mostly grainstone textures), in association with orbitolinid foraminifera and bioclasts of corals, rudists and gastropods. However, a few species are present only in mud-dominated fabrics (i.e. lower-energy intervals). The dasycladalean association from the Upper Aptian deposits of P?durea Craiului is of special interest, for this group registered a dramatic decline at the Lower Aptian/Upper Aptian boundary, as confirmed by the relative scarcity of the Dasycladales in the Upper Aptian carbonate deposits.

Creator (Dublin Core)

Ioan I. Bucur

Bruno Granier

Emanoil Sasaran

Subject (Dublin Core)

Calcareous algae, Upper Aptian, Padurea Craiului, Apuseni Mountains, Romania

Geology

QE1-996.5

Publisher (Dublin Core)

Croatian Geological Survey

Date (Dublin Core)

2008-12-01T00:00:00Z

Type (Dublin Core)

article

Identifier (Dublin Core)

1330-030X

1333-4875

10.4154/GC.2008.22

https://doaj.org/article/78ee9483de8640fca7d98a1349e2b4f9

Source (Dublin Core)

Geologia Croatica, Vol 61, Iss 2-3, Pp 297-309 (2008)

Language (Dublin Core)

EN

Relation (Dublin Core)

http://www.geologia-croatica.hr/ojs/index.php/GC/article/view/31

https://doaj.org/toc/1330-030X

https://doaj.org/toc/1333-4875

Provenance (Dublin Core)

Journal Licence: CC BY

Item