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| *****SWAAG_ID***** | 396 |
| Date Entered | 11/12/2011 |
| Updated on | 11/12/2011 |
| Recorded by | Tim Laurie |
| Category | Geological Record |
| Record Type | Geological HER |
| Site Access | Private |
| Record Date | 27/07/2011 |
| Location | Haw Edge Scars, Upper cliff. |
| Civil Parish | Muker |
| Brit. National Grid | NY 8675 0245 |
| Altitude | 380m |
| Geology | Tufa formation forming bulbous overhang on sandstone cliff undercut by Whitsundale Beck. Theis extensive tufa cliff extends down the eastern bank of the stream for more than 40m. The tufa has been laid down on the bedrock as a curtain over millenia by a constant seepage of strongly calcareous springwater falling down the cliff from springs which rise higher up the ravine. |
| Record Name | Haw Edge. Tufa cliff above Whitsundale Beck. |
| Record Description | This very significant tufa cliff is of exceptional interest as a living example of a tufa curtain similar or greater in extent than the well known fossil tufa curtains above Malham Cove.
This location has a primeval beauty, a wet glistening multi coloured surface of bacteria, diatoms, algae,lichens and mosses all of which cover the surface of the tufa only to be themselves subsequently interred for all time within the soft embrace of the tufa. |
| Geographical area | Upper Swaledale |
| Species | Orthothecium rufescens (1992 record) and as listed above (2011). |
| Common / Notable Species | See list. |
| Additional Notes | WE are fortunate to possess a list of the flowering and non flowering species recorded at the Haw Edge Tufa Cliff (Bogle Hole?) by Dr Allan Pentecost of the Malham Freshwater Biological Research Centre.
His list is as follows (Characteristics of all these unfamiliar species can be seen, by searching for each species named, the Internet):
Plant list from the Boggle Hole gorge tufas
Compiled August 2011 with some additions from a trip in 1992.
* Plants of special interest
A.Pentecost
Cyanobacteria
Chroococcus turgidus
Lyngbya nana
Rivularia biasolettiana
Scytonema alatum
S. myochrous
Stigonema minutum
Chlorophyta
Cladophora glomerata 1992
Cosmarium leave
Trentepohlia aurea
Rhodophyta
Chroothece richterianum *
Liverworts
Aneura pinguis
Conocephalum conicum
Jungermannia atrovirens
Pellia endiviifolia
Preissia quadrata
Mosses
Bryum pseudotriquetrum
Cratoneuron filicinum
Dichodontium pellucidum
Eucladium verticillatum
Gymnostomum aeruginosum
Orthothecium rufescens 1992*
Palustriella commutata
Philonotis fontana
Rhynchostegium riparioides
Ferns
Asplenium trichomanes
Angiosperms
Angelica sylvestris 1992
Parnassia palustris 1992
Pinguicula vulgaris
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| Image 1 ID | 1676 Click image to enlarge |
| Image 1 Description | Haw Edge Scars. Note the autumn colour of the aspens on the tufa cliff is at the upper end of the ravine. |  |
| Image 2 ID | 1672 Click image to enlarge |
| Image 2 Description | |  |
| Image 3 ID | 1671 Click image to enlarge |
| Image 3 Description | |  |
| Image 4 ID | 1668 Click image to enlarge |
| Image 4 Description | |  |
| Image 5 ID | 1674 Click image to enlarge |
| Image 5 Description | |  |
| Image 6 ID | 1666 Click image to enlarge |
| Image 6 Description | |  |
| Image 7 ID | 1667 Click image to enlarge |
| Image 7 Description | |  |
| Image 8 ID | 1670 Click image to enlarge |
| Image 8 Description | |  |
| Image 9 ID | 1671 Click image to enlarge |
| Image 9 Description | | |
| Image 10 ID | 1673 Click image to enlarge |
| Image 10 Description | |  |
| Image 11 ID | 1675 Click image to enlarge |
| Image 11 Description | |  |
| Image 12 ID | 1677 Click image to enlarge |
| Image 12 Description | Autumn colour from the aspens on the tufa cliff |  |
| Image 13 ID | 1678 Click image to enlarge |
| Image 13 Description | Autumn colour from the aspens on the tufa cliff |  |
| Image 14 ID | 1679 Click image to enlarge |
| Image 14 Description | Autumn colour from the aspens on the tufa cliff |  |
