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all geography including DSDP/ODP Sites and Legs
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English Channel Islands
Did an earthquake located off Jersey trigger a mudflow preserving the only loess outcrop known under the seas?
Hydrogeological investigation in the Channel Islands: the important role of German military geologists during World War II
Neoproterozoic palaeogeography of the Cadomia and Avalon terranes: constraints from detrital zircon U–Pb ages
Precise U–Pb zircon ages from Alderney, Channel Islands: growing evidence for discrete Neoproterozoic magmatic episodes in northern Cadomia
U–Pb geochronological constraints on the timing of plutonism, volcanism, and sedimentation, Jersey, Channel Islands, UK
A precise late Neoproterozoic U-Pb zircon age for the syntectonic Perelle quartz diorite, Guernsey, Channel Islands, UK
U–Pb geochronology and Sm–Nd isotopic composition of Proterozoic gneisses,Channel Islands, UK
Radon investigations for tunnelling projects: a case study from St Helier, Jersey
Neoproterozoic shear zone tectonics within the Icartian basement of Guernsey and Sark, Channel Islands
Significance of a hiatus in down-temperature fabric development within syn-tectonic quartz diorite complexes, Channel Islands, UK
Discussion on petrology of a magma chamber: the Plutonic Complex of Guernsey (Channel Islands, UK)
Petrology of a magma chamber: the Plutonic Complex of Guernsey (Channel Islands, UK)
Magma-mingling and melt modification between granitic pipes and host diorite, Guernsey, Channel Islands
Discussion on tectonothermal chronology of early Cadomian arc development in Guernsey and Sark, Channel Islands
Timing of post-tectonic Cadomian magmatism on Guernsey, Channel Islands: evidence from 40 Ar/ 39 Ar mineral ages
Tectonothermal chronology of early Cadomian arc development in Guernsey and Sark, Channel Islands
The late Precambrian/early Cambrian Monian basement to the lower Paleozoic cover in Anglesey does not form one coherent stratigraphic unit but is divisible into at least three separate suspect terranes. Where they are exposed, the boundaries to these terranes range from ductile shear zones to brittle faults, all of which have an undetermined amount of displacement. Terrane 1 is represented by the Monian Supergroup: a thick sequence of marine sedimentary rocks with subordinate basic volcanic rocks, gabbros, and serpentinites, overlain by olistostromic mélange. Terrane 2 is identified as the Coedana Complex of central Anglesey: high-grade gneisses and the ca. 600-Ma Coedana Granite with an associated hornfels. Terrane 3 is represented by the southeast Anglesey schist belt and includes the ca. 550 to 560-Ma Anglesey blueschists. These suspect terranes are bounded to the southeast by the Menai Strait Fault System, to the southeast of which rocks of the Sarn Complex are placed within a separate terrane which may represent the northwest margin of the Avalon terrane in Britain. Terrane 1 and possibly terrane 2 are traceable into southeast Ireland (Cullenstown Formation and Rosslare Complex). Monian terranes are not known from elsewhere within the British Isles, although broadly coeval rocks occur in different terranes as the Avalonian/Cadomian rocks of southern Britain and the Channel Islands, and the Dalradian Supergroup of Scotland and northwest Ireland. No Monian rocks have yet been identified from the Tornquist line in the east, whereas several attempts at correlation have been made between Anglesey and the eastern seaboard of North America. Such attempts have failed to appreciate that there is not one “Mona Complex,” but a collage of disparate terranes, some of which are juxtaposed by shear zones comparable in scale to major crustal shears developed along transcurrent plate boundaries.