2021

SE0061 : Cairn marking the Summit of Elbolton

taken 3 years ago, near to Thorpe, North Yorkshire, England

Cairn marking the Summit of Elbolton
Cairn marking the Summit of Elbolton
Summit furniture on the Cracoe Reef Knoll of Elbolton - a large deposit of limestone beside the western flanks of Barden Moor, formed over 300 million years ago.
The Craven Cracoean Reef Belt :: SD9860

The Craven Cracoean Reef Belt (CCRB) is an area of geology from Settle to Burnsall in North Yorkshire related to a Lower Carboniferous (Visean - Brigantian) apron reef situated on the southern limit of the Askrigg Block. A series of rounded hills mark the location of flank and mound carbonate deposits that separate 'shallow' shelf deposits north of the Mid Craven fault from 'deeper' deposits of the Craven Basin to the south.

With the development of a barrier like apron reef along the hanging wall of the Mid-Craven Fault; the ramp deposits of the Kinsley Formation (thickly bedded muddy carbonates affected by tides and storms SD6975 : Carboniferous Coral) gave way to back-reef deposits (thinly bedded pure carbonates) of the Cove and Gordale Formations.

The mounds themselves are mostly massive limestone with some areas containing crinoidal deposits, sponges, corals, brachiopods and stromatolites. The earliest reefal structures are small mudmounds, as movement along the Craven Faults progressed the mounds grew into the larger structures visible today. Swinden Quarry is a great example of a core and flank reef that has been dissected by quarrying.

Also worth seeing is the exposure at Loup Scar SE0361 : Loup Scar (5). Flank limestones has been channelised, infilled and rotated by fault movement. This shows the dynamic active environment that these rocks were deposited. See 'Mississippian reef development in the Cracoe Limestone Formation of the southern Askrigg Block, North Yorkshire, UK' by Waters et al., 2017 for more details.


Creative Commons Licence [Some Rights Reserved]   © Copyright Chris Heaton and licensed for reuse under this Creative Commons Licence.
Geographical Context: Uplands other tags: Cairn Hill Summit Reef Knoll Click a tag, to view other nearby images.
This photo is linked from: Automatic Clusters: · Elbolton Summit [5] · Limestone Reef Knoll [5] · Marks [3] · Summit Cairn [3] · Flanks [2] ·
1:50,000 Modern Day Landranger(TM) Map © Crown Copyright
+
+
1:50,000 Modern Day Landranger(TM) Map © Crown Copyright
TIP: Click the map for more Large scale mapping
Grid Square
SE0061, 31 images   (more nearby 🔍)
Photographer
Chris Heaton   (more nearby)
Date Taken
Sunday, 21 February, 2021   (more nearby)
Submitted
Wednesday, 24 February, 2021
Subject Location
OSGB36: geotagged! SE 0061 6152 [10m precision]
WGS84: 54:2.9786N 1:59.5305W
Camera Location
OSGB36: geotagged! SE 0063 6150
View Direction
Northwest (about 315 degrees)
Clickable map
+
NW N NE
W Go E
SW S SE
Image Type (about): geograph 
This page has been viewed about 34 times
You are not logged in login | register