Cryptic Disc Structures Resembling Ediacaran Discoidal Fossils from the Lower Silurian Hellefjord Schist, Arctic Norway. [PDF]
PLoS ONE, 2016 The Hellefjord Schist, a volcaniclastic psammite-pelite formation in the Caledonides of Arctic Norway contains discoidal impressions and apparent tube casts that share morphological and taphonomic similarities to Neoproterozoic stem-holdfast forms.
Christopher L Kirkland +3 more
doaj +8 more sources
Caledonian reactivation and reworking of Timanian thrust systems and implications for latest Mesoproterozoic to mid-Paleozoic tectonics and magmatism in northern Baltica [version 2; peer review: 1 approved, 2 approved with reservations, 1 not approved] [PDF]
Open Research EuropeBackground The Trollfjorden–Komagelva Fault Zone is the southernmost thrust fault of the Timanian Orogen and extends for thousands of kilometers from northwestern Russia to northern Norway.
Eirik Stokmo, Jean-Baptiste P. Koehl
doaj +2 more sources
Mafic and ultramafic igneous rocks of the Raisduoddar-Halti area in the Finnish-Norwegian Caledonides. Petrography, mineralogy and geochemistry [PDF]
Bulletin of the Geological Society of Finland, 1991 The mafic and ultramafic rocks in the Raisduoddar-Halti area constitute a shallow horizontal allochthonous plate in the highest tectono-stratigraphic position of the Finnish Caledonides.
P. Sipilä
doaj +1 more source
Magnetic properties of pseudotachylytes from western Jämtland, central Swedish Caledonides [PDF]
Solid Earth, 2020 Fault kinematics can provide information on the relationship and assembly of tectonic units in an orogen. Magnetic fabric studies of faults where pseudotachylytes form have recently been used to determine direction and sense of seismic slip in ...
B. S. G. Almqvist +4 more
doaj +1 more source
Geosciences, 2020 The deep biosphere hosted in fractured rocks within the upper continental crust is one of the least understood and studied ecological realms on Earth. Scarce knowledge of ancient life and paleo-fluid flow within this realm is owing to the lack of deep ...
Henrik Drake +2 more
doaj +1 more source
Partial melting of zoisite eclogite from the Sanddal area, North-East Greenland Caledonides [PDF]
European Journal of Mineralogy, 2020 Metamorphic textures and a pressure–temperature (P–T) path of zoisite eclogite are presented to better understand the metamorphic evolution of the North-East Greenland eclogite province and this particular type of eclogite.
W. Cao +4 more
doaj +1 more source
The concealed Caledonide basement of eastern England and the southern North Sea : a review [PDF]
, 1995 Field mapping, analysis of borehole core and studies of geophysical potential field and seismic data can be used to demonstrate the existence of a number of distinct crustal blocks within Eastern Avalonia beneath eastern England and the southern North ...
England, R., Lee, Mick, Pharaoh, Tim
core +1 more source
U-Pn geochronology of deformed metagranites in central Sutherland, Scotland: evidence for widespread late Silurian metamorphism and ductile deformation of the Moine Supergroup during the Caledonian orogeny [PDF]
, 2003 Within the Caledonides of central Sutherland, Scotland, the Neoproterozoic metasedimentary rocks of the Moine Supergroup record NW-directed D2 ductile thrusting and nappe assembly, accompanied by widespread tight-to-isoclinal folding and amphibolite ...
Friend, C.R.L. +5 more
core +1 more source
Quantitative characterization of orogens through isotopic mapping
Communications Earth & Environment, 2023 The relationship between orogens and crustal growth is a fundamental issue in the Earth sciences. Here we present Nd isotope mapping results of felsic and intermediate igneous rocks from eight representative and well-studied Phanerozoic orogens.
Tao Wang +10 more
doaj +1 more source
Evidence from Rb–Sr mineral ages for multiple orogenic events in the Caledonides of Shetland, Scotland [PDF]
, 2015 Shetland occupies a unique central location within the North Atlantic Caledonides. Thirty-three new high-precision Rb–Sr mineral ages indicate a polyorogenic history.
Bird, A. F. +3 more
core +3 more sources