First record of scyphocrinoids in Türkiye and recognition of the Silurian/Devonian boundary interval (Halevikdere Section, Eastern Taurides)

Authors

EBERHARD SCHINDLERFollow
REIMUND HAUDEFollow
MEHMET NAMIK YALÇINFollow
RAINER BROCKEFollow
ATİKE NAZİKFollow
EMINE ŞEKER ZORFollow
Volker WILDEFollow
ACHIM WEHRMANNFollow

Abstract

During the Silurian/Devonian (S/D) boundary interval, scyphocrinoids (Crinoidea, Echinodermata) flourished on a global scale. The first record of scyphocrinoids from Türkiye, especially represented by their bulbuous loboliths, is now described from the Halevikdere Section in the Eastern Taurides. The Devonian part of the section is more than 1300 m thick and covers a time span from the S/D boundary interval to the Late Devonian (Famennian). It consists mainly of fine-grained to sandy siliciclastics, event-driven conglomerates/fanglomerates and biogenic carbonates deposited in deep shelf to shallow-water coastal settings. The S/D boundary interval was measured and studied in great detail. The dominant lithology in the boundary interval is dark organic-rich shales with a few intercalated limestones, commonly as separate nodules. For biostratigraphic age determination palynomorphs and ostracods are most important and allow narrowing down the S/D boundary to an interval of a few metres. The scyphocrinoid loboliths are of the plated type and mainly derived from two layers adjacent to the S/D boundary. They are assigned to the camarocrinoids, in particular to the genus Camarocrinus (with the species Camarocrinus legrandi). The function of the loboliths as floating buoys is briefly discussed and supported.

Author ORCID Identifier

EBERHARD SCHINDLER: 0009-0002-9019-0305

REIMUND HAUDE: 0000-0002-1849-9554

MEHMET YALÇIN: 0000-0002-4542-1218

RAINER BROCKE: 0000-0001-5170-4866

ATİKE NAZİK: 0000-0001-7996-7430

EMINE ŞEKER ZOR: 0000-0001-7221-5922

ACHIM WEHRMANN: 0000-0001-9811-6869

Volker WILDE: 0009-0008-6606-3377

DOI

10.55730/1300-0985.1971

Keywords

Biostratigraphy, buoy function, Camarocrinus, loboliths, northern Gondwana, S/D boundary

First Page

479

Last Page

503

Publisher

The Scientific and Technological Research Council of Türkiye (TÜBİTAK)

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Recommended Citation

SCHINDLER, EBERHARD; HAUDE, REIMUND; YALÇIN, MEHMET NAMIK; BROCKE, RAINER; NAZİK, ATİKE; ZOR, EMINE ŞEKER; WILDE, Volker; and WEHRMANN, ACHIM (2025) "First record of scyphocrinoids in Türkiye and recognition of the Silurian/Devonian boundary interval (Halevikdere Section, Eastern Taurides)," Turkish Journal of Earth Sciences: Vol. 34: No. 4, Article 2. https://doi.org/10.55730/1300-0985.1971
Available at: https://journals.tubitak.gov.tr/earth/vol34/iss4/2