The Causey Pike Fault or Causey Pike Thrust is a major WSW-ENE trending fault within the Lower Paleozoic rocks of the English Lake District. It is named for Causey Pike, where the fault was first recognised.
The Causey Pike Fault or Causey Pike Thrust is a major WSW-ENE trending fault within the Lower Paleozoic rocks of the English Lake District. It is named for Causey Pike, where the fault was first recognised.
The Causey Pike Fault has been recognised across the entire outcrop of the Lake District inlier, extending about 35 km from near Ennerdale Bridge in the west, to near Troutbeck in the east. A possible continuation of the fault to the east has been recognised in the Cross Fell inlier, where it also juxtaposes two differing parts of the Skiddaw Group. [1]
It juxtaposes two successions dominated by mudrocks that are of similar age. [1] To the north of the fault, the Ordovician Skiddaw Group is represented by the Kirk Stile Formation, to the south by the Buttermere Formation, both of Arenig age. The younger sequence of volcanic rocks overlying the Skiddaw Group also differs, with the Eycott Volcanic Group to the north and the Borrowdale Volcanic Group to the south. The fault is described as a thrust near Causey Pike, where metasomatised rocks of the Crummock Water Aureole are emplaced over sandstone olistoliths of the Buttermere Formation, but the overall displacement on this structure is oblique, with a significant component of sinistral (left lateral) strike-slip motion. [2]
The differences in stratigraphy and interpreted depositional environment across the fault may indicate that the fault was originally a normal fault, active during deposition of the Skiddaw Group. The oblique slip movement on the fault occurred during the Acadian Orogeny, at least in part postdating the contact metamorphism that caused the development of the Crummock Water Aureole (dated to about 401 Ma - Emsian), which itself postdates the formation of the regional cleavage seen within the Skiddaw Group. [2]
The geology of Great Britain is renowned for its diversity. As a result of its eventful geological history, Great Britain shows a rich variety of landscapes across the constituent countries of England, Wales and Scotland. Rocks of almost all geological ages are represented at outcrop, from the Archaean onwards.
The exposed geology of the Death Valley area presents a diverse and complex set of at least 23 formations of sedimentary units, two major gaps in the geologic record called unconformities, and at least one distinct set of related formations geologists call a group. The oldest rocks in the area that now includes Death Valley National Park are extensively metamorphosed by intense heat and pressure and are at least 1700 million years old. These rocks were intruded by a mass of granite 1400 Ma and later uplifted and exposed to nearly 500 million years of erosion.
Grasmoor is a mountain in the north-western part of the Lake District, northern England. It is the highest peak in a group of hills between the villages of Lorton, Braithwaite and Buttermere, and overlooks Crummock Water.
The Borrowdale Volcanic Group is a group of igneous rock formations named after the Borrowdale area of the Lake District, in England. They are Caradocian in age. It is thought that they represent the remains of a volcanic island arc, approximately similar to the island arcs of the west Pacific today. This developed as oceanic crust to the (present) north-west and was forced by crustal movement under a continental land-mass to the present south-east. Such forcing under, as two plates meet, is termed subduction. This land-mass has been named Avalonia by geologists. It is now incorporated into England and Wales and a sliver of North America.
Clough Head is a fell, or hill, in the English Lake District. It marks the northern end of the main ridge of the Helvellyn range and is often walked as part of the ridge walk. The fell stands south of the village of Threlkeld and the A66 road, and it forms the steep eastern side of the tranquil valley of St John's in the Vale.
Crag Hill is a mountain in the North Western part of the English Lake District. It was formerly known as Eel Crag; however, the Ordnance Survey now marks Eel Crag as referring to the northern crags of the fell. It is not to be confused with another Crag Hill lying on the border of North Yorkshire.
Causey Pike is a fell in the English Lake District. It is situated in the Newlands Valley, 5 km south-west of the town of Keswick. Even though it has a modest height of 637 metres (2,090 ft) it is one of the most distinctive fells when viewed from the Derwent Water and Keswick area due to its distinguishing summit "knobble" which catches the eye. The fell is one of 214 fells described by Alfred Wainwright in his series of Pictorial Guides to the Lakeland Fells: Causey Pike features in Book Six, The North Western Fells.
Mellbreak is a hill in the Western part of the English Lake District. Despite being surrounded on all sides by higher fells, it stands in isolation. It is surrounded on three sides by a "moat" of deep marshy land, and on the east side by the lake of Crummock Water. The fell forms a partnership with the lake, running parallel to it, falling sheer into it, and regularly providing the backdrop for pictures of it.
Rannerdale Knotts is a fell in the Lake District of Cumbria, England. Rising from the Buttermere valley, it is one of the smaller Cumbrian hills and is overlooked by a number of surrounding fells, such as Grasmoor, Whiteless Pike and, across Crummock Water, Mellbreak and the High Stile ridge. Rannerdale Knotts is said to be the site of a battle between the native Cumbrians and Norsemen and the invading Normans in the late 11th or early 12th century.
Outerside is a fell in the Lake District in Cumbria, England. It is located 6 kilometres west of Keswick in the north western part of the national park and is a smaller member of the Coledale group of fells with a height of 568 metres (1863 feet). The fell is part of a ridge on the southern side of Coledale which descends from the higher fell of Scar Crags and continues over the neighbouring smaller fell of Barrow before reaching the valley at the village of Braithwaite.
Wandope is a fell in the north-western area of the English Lake District. It lies to the east of Crummock Water and south of Crag Hill. From the summit there are excellent panoramas of the Sca Fell and High Stile ranges.
Whiteless Pike is a fell in the north-western English Lake District. It stands immediately east of Crummock Water and forms a pyramid shape when viewed from Rannerdale. In his celebrated guide to the Lakeland fells, Alfred Wainwright called it "the Weisshorn of Buttermere". There are good views of Great Gable and the Scafells from the summit.
Sail is a hill in the English Lake District, lying between Derwentwater and Crummock Water.
For the Skiddaw group of hills, see Skiddaw Group
The Wrekin Terrane is one of five inferred fault bounded terranes that make up the basement rocks of the southern United Kingdom. The other notable geological terranes in the region are the Charnwood Terrane, Fenland Terrane, Cymru Terrane and the Monian Composite Terrane. The Wrekin Terrane is bounded to the west by the Welsh Borderland Fault System and to the east by the Malvern Lineament. The geological terrane to the west is the Cymru Terrane and to the east is Charnwood Terrane. The majority of rocks in the area are associated with the outcrops that are evident at the faulted boundaries.
The Geology of Jamaica is formed of rocks of Cretaceous to Neogene age. The basement consists of Cretaceous island arc and back-arc basin sequences that formed above a subduction zone. The cover is of mainly Eocene to Miocene shallow water limestones, that have been uplifted due to the presence of a restraining bend along the major strike-slip faults that bound the southern edge of the Gonâve Microplate to the north of the island.
The Dent Group is a group of Upper Ordovician sedimentary and volcanic rocks in north-west England. It is the lowermost part of the Windermere Supergroup, which was deposited in the foreland basin formed during the collision between Laurentia and Avalonia. It lies unconformably on the Borrowdale Volcanic Group. This unit was previously known as the Coniston Limestone Group or Coniston Limestone Formation and should not be confused with the significantly younger Coniston Group.
The Eycott Volcanic Group is a group of volcanic rock formations of Ordovician age named after the locality of Eycott Hill in the English Lake District. The group overlies the Skiddaw Group and is unconformably overlain by a variety of different Devonian and Carboniferous age rocks.
The geology of England's Lake District is dominated by sedimentary and volcanic rocks of mainly Ordovician age underpinned by large granitic intrusions. Younger sedimentary sequences outcrop on the edges of the Lake District area, with Silurian to the south, Carboniferous to the north, east and west and Permo-Triassic to the west and east. The entire area was covered by a Mesozoic sequence that was eroded off during Paleogene uplift related to the opening of the North Atlantic. During the Quaternary the area was affected by repeated glaciations, which sculpted the current mountainous landscape.
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