An investigation into the origin and nature of some organic deposits of the Ingleborough region

摘要: Five sites were investigated, in the Ingleborough region of Yorkshire, Helwith Moss, Thieves Scar Close, Moughton, and Howrake Rocks. Samples of peat extracted by means a borer, or taken from monoliths, their structure pollen content examined. Profiles pollen diagrams produced for each site. Helwith Moss was found to have developed former lake which became invaded aquatic mosses, then reed swamps finally raised bog. Peat formation began zone V, bog initiated at Boreal-Atlantic transition, when climate wetter. An important recurrence surface in, sub-zone VIIb, where changes noticeably relatively humified Eriophorum- spaghum type light brown less Sphagnum imbricatum. As this did not coincide with suggested position VII/VIII boundary diagram, transition postulated 235 cms. start VIII 120 cms. Thieves also lake which colonised Carex swamp, hypnoid moss, The upper layer is mixed including monocotyledonous material. Pollen preserved zones II VII, latter being latest any belongs. change swamp took place end VIa, lowering of water table probably caused removal barrier southern side Moss. This would lessen considerably influence calcareous drainage allowing more acid conditions develop corresponding vegetational change. appears be affected erosion actively taking place, because well system limestone area. At Close lies continuous on slopes above pavement but only patches itself. diagrams eight suggest that cover once over whole area. belongs VIII. On slopes above it has formed drift covers actual contact limestone. It may thin now been washed into the grykes, directly later widening grykes under peat, an increase rate solution series lower show progressive truncation below. These interpreted, either as gradual spreading onto above, result oxidation layers limestone. The information Moughton Rocks suggests situ, slipped down above.