2017

SD9163 : Janet's Foss

taken 6 years ago, near to Malham, North Yorkshire, England

This is 1 of 41 images, with title Janet's Foss in this square
Janet's Foss
Janet's Foss
Apron reef deposits dipping towards the Mid Craven fault.
Janet's Foss

Janet's Foss is a small waterfall in the vicinity of Malham. It carries Gordale Beck over a limestone outcrop topped by tufa into a deep pool below. The pool was traditionally used for sheep dipping.
The name Janet (sometimes Jennet) is thought to be a folk tale reference to a fairy queen who inhabited a cave at the rear of the fall. Foss is a Nordic word for waterfall, still used in Scandinavia, and is presented in a number of cases in England as 'force'

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 Ashley Dace and licensed for reuse under this Creative Commons Licence.
This photo is linked from: Automatic Clusters: · Craven Fault [8] Title Clusters: · Janet's Foss [41] ·
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
SD9163, 290 images   (more nearby 🔍)
Photographer
Ashley Dace   (more nearby)
Date Taken
Tuesday, 10 October, 2017   (more nearby)
Submitted
Thursday, 26 October, 2017
Subject Location
OSGB36: geotagged! SD 9114 6330 [10m precision]
WGS84: 54:3.9338N 2:8.2120W
Camera Location
OSGB36: geotagged! SD 9111 6329
View Direction
East-northeast (about 67 degrees)
Clickable map
+
NW N NE
W Go E
SW S SE
Image Type (about): geograph 
This page has been viewed about 56 times
You are not logged in login | register