The Neoproterozoic Rivieradal Group of Kronprins Christian Land, eastern North Greenland

The Rivieradal Group, formally defined here, is confined to the Vandredalen thrust sheet of the Caledonian orogen in Kronprins Christian Land, eastern North Greenland. It comprises a succession of Neoproterozoic siliciclastic sediments that represent the fill of a half-graben basin. The syn-rift Rivieradal Group is overlain by post-rift sediments of the Hagen Fjord Group. The latter succession is present in both the thrust sheet and the Caledonian foreland to the west. In the foreland, where the Rivieradal Group is not represented, the Hagen Fjord Group disconformably overlies Palaeoproterozoic–Mesoproterozoic sandstones of the Independence Fjord Group

Notes on the Windermere Supergroup of the country between Kendal and the River Lune on 1:25000-scale sheets SD59 and SD69(W) : part of 1:50 000 geological series sheet 39 (Kendal) : with appendices relating to NY40SE and SD49NE

This report describes the bedrock geology and structure of the country that lies between the valleys of the River Kent to the west and the River Lune to the east and thus lies between the Lake District and the Howgill Fells. The bedrock stratigraphy is described in section 2. Approximately 2800 m of uppermost Windermere Supergroup rocks of Ludlow age are exposed in the region, belonging to the Coniston Group and succeeding Bannisdale and Kirkby Moor Formations. The Coniston Group is undivided in the area. The former ‘Underbarrow Formation’ has been abandoned as a lithostratigraphical division. The structure is described in section 3. The occurrences of minor intrusions in the area are described in section 4. The lamprophyre dykes are considered to have been emplaced over an extended period during Early Devonian times, whilst the microgranitic bodies (Shap Dyke-swarm) are coeval with the Shap Granite Pluton. Also included are two appendices that update previous mapping on NY40SE and SD49NE. These document in particular changes to the interpretation of the stratigraphy and structure, consequent upon work completed during resurvey of 1: 10 000 sheets SD59 and SD69. Importantly this includes part of the axial region of the Bannisdale Syncline, the southern limb of which is largely faulted out

The Caledonian thin-skinned thrust belt of Kronprins Christian Land, eastern North Greenland

Kronprins Christian Land in the extreme north of the East Greenland Caledonides, exposes a thin-skinned thrust belt up to 50 km wide developed in Ordovician–Silurian platform limestones and dolostones of the Iapetus passive margin. This thrust belt is characterised by a series of SSW–NNE-trending and east-dipping Caledonian thrusts with westward displacements of generally a few kilometres each. It passes westwards into undisturbed autochthonous foreland. Based on a line and area restoration, total displacement along a well-exposed WNW–ESE section through the thrust belt amounts to 17.6 km, which represents a shortening of 45% in the line of section. Biostratigraphic control in the limestone and dolostone succession is based on conodonts and macrofossils. The alteration colours of the conodonts provide estimates of maximum burial temperatures, which show that the thickness of the overlying thrust sheets ranged from about 6 to 12.5 km from west to east across the thrust belt. Since the estimated former thickness of the Vandredalen thrust sheet above the thin-skinned parautochthonous thrust belt is insufficient to yield the temperatures attained, higher thrust sheets must once have extended across the region

East Greenland Caledonides: stratigraphy, structure and geochronology: The Neoproterozoic Rivieradal Group of Kronprins Christian Land, eastern North Greenland

The Rivieradal Group, formally defined here, is confined to the Vandredalen thrust sheet of the Caledonian orogen in Kronprins Christian Land, eastern North Greenland. It comprises a successionof Neoproterozoic siliciclastic sediments that represent the fill of a half-graben basin. The syn-rift Rivieradal Group is overlain by post-rift sediments of the Hagen Fjord Group. The latter succession is present in both the thrust sheet and the Caledonian foreland to the west. In the foreland, where the Rivieradal Group is not represented, the Hagen Fjord Group disconformably overlies Palaeoproterozoic–Mesoproterozoic sandstones of the IndependenceFjord Group