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Abstract:

In some dolines along the motorway Divača-Kozina archaeological test trenches were excavated. Out of six dolines, a karstic pocket and a cave filled up by sediments at the surface, the X-ray analyses of unconsolidated clastic sediments were done. In the bottom of all these dolines yellow sediments, slightly reddish in places, and also red loam were found. Mineralogical analyses show that differently coloured sediments have the same origin from the flysch rocks. In caves and at the bottom of depressions the sediments are yellow but when they are in contact with the athmosphere they become red. Red coloured sediments and red soil on karst may have their origin not only in flysch rocks but also in weathered remains of limestone with cherts and even in eolian sediments.