Calcareous nannofossil biostratigraphy and petrological analysis of the pre-evaporitic diatomaceous sediments from Gavdos Island, southern Greece

Triantaphyllou, MV; Tsaparas, N; Stamatakis, M; Dermitzakis, MD

dc.contributor.author	Triantaphyllou, MV	en
dc.contributor.author	Tsaparas, N	en
dc.contributor.author	Stamatakis, M	en
dc.contributor.author	Dermitzakis, MD	en
dc.date.accessioned	2014-03-01T01:48:50Z
dc.date.available	2014-03-01T01:48:50Z
dc.date.issued	1999	en
dc.identifier.issn	0028-3630	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/25613
dc.subject.classification	Paleontology	en
dc.subject.other	MIOCENE	en
dc.subject.other	DIAGENESIS	en
dc.title	Calcareous nannofossil biostratigraphy and petrological analysis of the pre-evaporitic diatomaceous sediments from Gavdos Island, southern Greece	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1999	en
heal.abstract	The main goal of this study is the biostratigraphical and petrological analysis of the Upper Miocene diatomaceous sediments of Gavdos Island, Greece. The studied sequence is dominated by finely laminated diatomaceous sediments which are cyclically alternating with marlstone and white limestone beds. The biostratigraphical analysis based on calcareous nannofossils achieved the correlation of the diatomaceous marine sediments of Gavdos Island with Zone CN 9b (OKADA & BUKRY 1980) and with the upper part of the Zone NN 11 (MARTINI 1971) or with the C. leptoporus Zone (THEODORIDIS 1984), which chronostratigraphically indicate a Messinian age. The presence of small Gephyrocapsa spp. (forms which generally appear in the Lower Pliocene) in the studied sediments is reported for the first time from the Greek area. Additionally the non-birefringent ceratoliths are well represented including also the species Amaurolithus tricorniculatus. Moreover the extremely rare occurrence of birefringent ceratoliths has been shown. On the other hand the applied petrological studies demonstrate that the diatom layers are rich in amorphous silica (opal - A) and calcite characteristic of an embryonic silica diagenesis, whereas huntite, elastic quartz and feldspars are also present.	en
heal.publisher	E SCHWEIZERBARTSCHE VERLAGS	en
heal.journalName	NEUES JAHRBUCH FUR GEOLOGIE UND PALAONTOLOGIE-MONATSHEFTE	en
dc.identifier.isi	ISI:000082496200003	en
dc.identifier.issue	3	en
dc.identifier.spage	161	en
dc.identifier.epage	178	en