Prispevek v uvodnem delu prinaša pregled zgodovine raziskav prazgodovinskih najdišč na Notranjskem. V nadaljevanju so predstavljene tri arheološke lokacije, ki dobro zaobjamejo pozno bronasto in ...starejšo železno dobo notranjske halštatske skupnosti. Strateško pozicijo v sklopu Postojnskih vrat je imela v pozni bronasti dobi ali morda še nekoliko prej naselbina na Soviču nad Postojno. Naselbina na Cvingerju pri Dolenji vasi pri Cerknici je verjetno nastala med 10. in 9. st. pr. n. št. nad ponikalnico Velika Karlovica na obrobju Cerkniškega jezera. Prispevek se zaključi s predstavitvijo najdišča na Trnovem pri Ilirski Bistrici, kjer je bilo leta 1978 raziskano grobišče. Predstavljeni so grobovi, ki nakazujejo časovni okvir pokopovanja med 9. in 6. st. pr. n. št.
The K/T boundary in the Karst region (Italy and Slovenia) is well documented in correspondence to shallow water limestones. Its evidence is usually related to palaeontological data (disappearance of ...Cretaceous taxa and subsequent appearance of Tertiary ones), palaeomagnetism (Ch 29r) iridium anomaly and negative shift of
δ
13C.
In Italy, the Padriciano section highlights the K/T boundary included in the basal breccia of a peritidal cycle. Recent investigations brought to light a short well exposed new stratigraphic sequence containing the K/T boundary, 100 m east of Padriciano, as demonstrated by lithological, palaeontological and new isotopic data. The recording of a new peritidal setting denotes stressed environmental conditions. The findings of the biota mostly correspond to the lagoonal limestones of the peritidal cycle. It consists of small opportunistic thin shelled foraminifers, ostracods and gastropods. At Padriciano, the environmental stability occurred after episodes of strong fresh water influence. The intraclasts, oncolites and stromatolites have been observed in the Padriciano section. The broken shell fragments, algae and foraminifera have been found associated with fenestral fabric. These features indicate deposition in a shallow marine (intertidal to supratidal) environment. Algal boundstones and microbial (stromatolitic) laminae, crenulated domal laminae and crenulated conical laminae have been studied in petrographic sections for microstructures. The K/T boundary section has been analysed for the carbon and oxygen isotopic ratios. The
δ
13C values range from −
3.62 to −
10.01‰ (V-PDB) and the
δ
18O values range from −
3.85 to −
5.47‰ (V-PDB). This extreme depletion in the
δ
13C record has already been reported from other K/T boundary sections both in the Padriciano area (Italy) and in Slovenia (Dolenja Vas sections) and may be related to global climate change but also to local environmental changes occurring in the NW Adriatic Platform.
The transition of Maastrichtian to Danian in SW Slovenia was studied in two shallow marine carbonate successions. Apart from the extinction of some biota, the K/T boundary is reflected also in ...carbonate isotopic composition and in geochemistry. The K/T boundary is characterized by 20 cm to 1 m thick sedimentary breccia of intertidal origin. Extreme depletion in the
δ
13C content (up to −
8‰) was found in Dolenja Vas section just at this boundary. It related to global climatic changes caused by impact of extraterrestrial body followed by the destruction and combustion of terrestrial plants. Slight enrichment in
δ
13C content (up to 2‰) is evident at Danian/Selandian boundary too.
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