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Disclaimer: PC-Tax is the product of ongoing research and we continuously update the taxonomy and data.
PC-Tax is the Pontocaspian taxonomic platform that targets so-called Pontocaspian biota. These biota are a unique flora and fauna that evolved in mostly brackish lake systems in and around the Caspian Sea, Black Sea and adjacent lakes in the past few million years.

PC-Tax is developed as part of the EU-funded Innovative Training Network “PRIDE” (Drivers of Pontocaspian Biodiversity Rise and Demise). Between 2015 and 2018 we will include different lake biota, fossil and recent that characterize the Pontocaspian biota in PC-Tax. Initially we will focus on a number of groups including bivalves, gastropods, ostracods, and dinoflagellates.
The aim of PC-Tax is to provide standardized taxonomic information to be used by researchers working with Pontocaspian biodiversity. We aim to attract users beyond the PRIDE program. 
PC-Tax is maintained by Aleksandre Gogaladze & Niels Raes (Naturalis Biodiversity Center, Leiden, The Netherlands), so if you have any question please mail us at aleksandre(dot)gogaladze(at)naturalis(dot)nl

Welcome! This website provides an interactive, digitised version of the Alkaline Rocks and Carbonatites of the World volumes, by Dr. Alan R. Woolley. Information can be accessed by using the map feature, search or occurence information.
The definition of alkaline rocks adopted is generally that of Sørensen (1974, p. 7): that they "are characterized by the presence of feldspathoids and/or alkali pyroxenes and amphiboles". The rocks included are, therefore, the nepheline syenites (phonolites) and ijolites (nephelinites), basanites and feldspathoid-bearing gabbroic rocks; peralkaline (i.e. containing alkali pyroxene and/or amphibole) syenite, quartz syenite and granite, together with peralkaline trachyte, comendite and pantellerite.  Fenites are also included because of their intimate association with alkaline rocks and carbonatites, as are certain ultramafic and melilite-bearing rocks, including the alnoites and melilitolites. Analcime is treated as a feldspathoid for purposes of the above definition. In the case of alkaline rocks volcanic rocks, when plotted on the TAS diagram, rocks are included as alkaline if they plot in the alkaline fields.

CIGESMED: Coralligenous based Indicators to evaluate and monitor the "Good Environmental Status" of the MEDiterranean coastal waters
These results were obtained within the international Seas-Era ERA-Net Research Project CIGESMED: “Coralligenous based indicators to evaluate and monitor the "good environmental status" of the Mediterranean coastal waters”. The program is jointly funded by the French National funding agency ANR (contract number 12-SEAS-0001-01, 12-SEAS-0001-02, 12-SEAS-0001-03), the Greek GSRT (contract number 12SEAS-12-C2) and Tübitak (contract number 112Y393)