Cretaceous

Rock type: 
Age: 
66 millions years

Gray dacites. Forms an extensive cover. Phenocrysts: oligoclase, orthoclase, sanidin, quartz, biotite. Phenocrystal sizes: 0.1 - 2 mm, rarely 3-4 mm. Upper Cretaceous - Low Paleocen. Thickness: 500-600 metres.

Rock type: 
Age: 
86 millions years

Russia, Sakhalin, Chekhov peak. Quartzites, hematite quartzites, slates. Green shale formation. Krasnosel'skaya metamorphic series. Upper Cretaceous. asK2kr.

Rock type: 
Age: 
90 millions years

Sardinia, Gola di Gorropu. Middle-Upper Cretaceous succession of Eastern Sardinia. Carbonatic shelf deposits: limestones and marls, cherty limestones, detritic glaucophane sandstones, of crica-infralittoral environment, with planktonic foraminifers, rudists and inoceramids. Upper Albian - Maastrichtian.

Rock type: 
Age: 
128 millions years

Low Cretaceous succession of Eastern Sardinia. Carbonatic shelf deposits: bioclastic limestones and marly limestones, oolitic and cherty limestones. Facies Urgoniana. Berriasian - Lower Albian.

Rock type: 
Age: 
86 millions years

Middle-Upper Cretaceous succession of Western Sardinia. Carbonatic shelf deposits: limestones, marls and glauconitic calcarenites of sublitoral environment with benthic foraminifers, algae, rudists, locally lacustrine limestones with carophyts. Middle-Upper Cretaceous. Cenomanian-Campanian. K2

Rock type: 
Age: 
86 millions years

Middle-Upper Cretaceous succession of Western Sardinia. Carbonatic shelf deposits: limestones, marls and glauconitic calcarenites of sublitoral environment with benthic foraminifers, algae, rudists, locally lacustrine limestones with carophyts. Middle-Upper Cretaceous. Cenomanian-Campanian. K2

Rock type: 
Age: 
135 millions years

Lower Cretaceous succession of Western Sardinia. Carbonatic shelf deposits: limestones, dolomitic limestones, oolitic limestones, and bioclastic limestones of sublittoral environment (facies "Urgoniana"; Dragonara Fm.), with benthic foraminifers, algae rudists, bryozoan, serpulids, at the base: paralic marly limestones and marls (facies "Purbeckiana"), with charophytes and ostracods. Lower Cretacous. Berriasian - lower Aptian. K1

Rock type: 
Age: 
140 millions years

Sandstone. Cretaceous. Berriasian. Fossil: Corbicula amagasiraensis Kob. et Suz.? Buchia sp. indet., Pleuromya cf. peregrina (Orb). K1b2

Rock type: 
Age: 
140 millions years

Siltstone. Cretaceous. Berriasian. Fossil: Corbicula amagasiraensis Kob. et Suz.? Buchia sp. indet., Pleuromya cf. peregrina (Orb). K1b2

Rock type: 
Age: 
86 millions years

Quartz Diorite Dyke. Dark gray, evenly grained rocks, massive texture. Consist: andesine up to 80%, augite up to 20%, quartz 10-12%, K-spar 0-6%. Accessory: apatite, zircon. Cretaceous. γδK2