assignment 3 field photos notes, september 18, 2011

HORNE LAKE FIELD TRIP – PHOTOS & NOTES – SEPTEMBER 18, 2011

Site 1 – At base of trail. 7-8 m high and 6-7 m wide limestone bluff with 1-2 m thick dipping limestone beds. Number of small solutional holes visible in limestone outcrop

Site 2 – At 6th switchback on trail or somewhere nearbyModerately steep slopes in forest with no evidence for surface water flow. Lack of surface water flow a possible indicator for karst. Evidence for dry gully/ small linear depression.

Site 3 – At 8th switchback  Limestone outcrop with slightly overhanging block. Well defined beds in limestone dipping 50 degrees to south. 

Site 4 - At 3rd crossing of River Bend Gully Dry valley upslope. 4-5 m long, 20-30 cm wide and 1-2 m deep grike/solutional hole. Outcrop with well defined beds nearby

Site 5 – The big and small sinkholesSmall lookout on side of trail. Three sinkholes present – one large, one small and one possible. Large sinkhole oval in shape 25-30 m long, 15 m wide and 3-5 m deep. Two possible drainage foci, with two small solutional openings in one. Possibly two sinkholes that have coalesced. Small sinkhole nearer to trail 5-6 m diameter and 2 m deep, 60-70% sideslopes. Smaller less defined depression upslope of small sinkhole – possible sinkhole.

Site 6 – Just above River Bend Entrance Upslope – 2-3 m wide channel in 20-25 m wide and 6-7 m high gully. Dry. With cobble/gravel channel leading down to cave entrance, acting as a swallet. Downslope possible overflow and old dry valley.

Site 7 – Cougar Cave area Cave entrance 1 m by 1 m, with steep drop into passage <10 m long. Lots of rounded limestone outcrop with exposed epikarst surface and solutional holes and thin soil cover. 6-7 m long and 0.5 m wide and >1 m deep grike feature.

Site 8 – On trail back down Sloping trail back to Site #1 - plant and forest interpretation?