Sorthat Formation
The Sorthat Formation is a geologic formation on the island on Bornholm, Denmark. It is of latest Pliensbachian-Lower Toarcian age. Plant fossils have been recovered from the formation, along with several traces of invertebrate animals. The "Sorthat Formation" is overlain by fluvial to lacustrine gravels, along with sands and clay along with parts covered by coal beds, that are part of the Aalenian-Bathonian Bagå Formation. In fact the "Sorthat Formation" was included on most of late SXX studies as the lowermost part of the "Bagå Formation", recovering the latest Pliensbachian to lower Aalenian boundary, that was dismissed after comparing the geology of the two. The Sorthat strata recover a mostly marginal deltaic to marine unit, where large streams fluctuated to the east where a large river system was established at the start of the Toarcian. At the northwest the local Vulcanism, that started on the lower Pliensbachian, extended along the North Sea and mostly from southern Sweden. At this time, the Central Skåne Volcanic Province and the Egersund Basin expulsed most of his strata, with influences on the local tectonics. The Egersund Basin has abundant fresh prophyritic Nephelinite lavas and dykes of lower Jurassic Age, with a composition nearly equal to those found on the clay pits. That reveals the translation of strata from the Continental margin by large fluvial channels, that ended on the sea deposits of the Ciechocinek Formation "Green series".
Q736917
geologic formation
Concept
Q769680
Bornholm
LOC
Q35
Denmark
LOC
Q300887
Aalenian
LOC
Q791313
Bathonian
TIME
Q14976097
Bagå Formation
LOC
Q540479
Pliensbachian
LOC
Q1693
North Sea
LOC
Q34
Sweden
LOC
Q10717030
Central Skåne Volcanic Province
LOC
None
Egersund Basin
UNK
None
prophyritic
UNK
Q1344173
Nephelinite
Concept
Q85752443
Ciechocinek Formation
UNK
Q96406045
Sorthat Formation
UNK
Q96406045
Sorthat Formation
UNK
Q96406045
Sorthat Formation
UNK
country