This paper describes vertical fine-scale geochemical heterogeneity of Estonian graptolite
argillite (GA). GA samples from Pakri and Saka outcrop sections were collected at 20 cm …

The occurrence of Cambrian to Ordovician organic-rich black shale deposits has been
known in Baltoscandia, including Estonia, for a long time. The Estonian graptolite argillite …

Abstract The Alum Shale Formation, a widespread metal-rich black shale in Baltoscandia,
was deposited during the Cambrian–Ordovician transition. Given that it straddles a period of …

The Estonian black argillites formed in Late Cambrian and Early Ordovician (Tremadoc) just
after the Cambrian evolutionary explosion, nicely illustrated by the famous Burgess shales …

Clay minerals are exceptionally well preserved in marine black shale of the ca. 2.1 Ga
Francevillian Group in southeastern Gabon. The FB Formation of the Francevillian Group is …

A persistent problem in the study of garnet geochemistry is that the consideration of major
elements alone excludes a wealth of information preserved by trace elements, particularly …

The occurrences of Cambro-Ordovician organic-rich black shale and their metamorphosed
Precambrian and Lower Palaeozoic analogues have been known in Fennoscandia for a …

Mineralogical composition and trace elements distribution in the< 2-mu m size fraction of
Late Cretaceous-Oligocene shales from the southern Apennines (Italy) are presented. The …

Mineralogical and geochemical studies of Cretaceous segments of Argille Varicolori and
Flysch Rosso successions from the southern Apennines allow their provenance and history …

Abstract “Schistes carton”, Jurassic black shale rocks occurring in the south-western part of
the Grand Duchy of Luxembourg, were investigated, based on a combined mineralogical …