UM IM CAVE 12

Description

Herbert Daniel Gebauer - 06/01/2018

A clean (Sheen 2005.02.17 Mss) or calcite lined (Jarratt 2005.03.06 Mss) shaft, approximately 3 m in diameter, drops along a lateral glittering aven (Jarratt 2005.03.06 Mss) to a choice of depths ranging from 10 m to 55 m (note 1). SITUATION: At an unexplainable location somewhere on the Shnongrim ridge (Brooks 2005.02.15 Mss: Um Im; Jarratt 2005.03.06 Mss -Cave Log- vol. XII; Sheen 2005.02.17 Mss: Um Im 12; Sheen 2005.08.20 Mss). APPROACH 2005.02.15: Just like the approch to –>Um Im Cave 05 because the cave entrances of all the Um Im Caves 2-12 … are very close [to the entrance of Um Im Cave 05] & the best approach is to walk to Um Im 6 / 2-5 (Lost World) first (Brooks, S J 2005.02.15 Mss: Um Im 5 (Shnongrim) 15-2-2005). APPROACH 2005.08.20: From the path 140 m south-east of the Lost World Doline, walk downhill in an easterly direction for about 300 m to waystation -near- (±14 m) N 25 21 30.6 E 092 31 35.3 GWS 84 [sic! WGS84] precision 14m 8/02./05 pilot sheen Garmin Etrex and head nrth down into a depression for 120 m. The shaft is located in pinnacle karst on the east side of the depression (Sheen, R F 2005.08.20 Mss). CAVE DESCRIPTION 2005.02.16: A calcite lined 35 m pitch (Jarratt, A R 2005.03.06 Mss -Cave Log- vol. XII, 16/2/05). CAVE DESCRIPTION 2005.02.17: A clean shaft, approximately 3 m in diameter, drops about estimated 50 m. See Brian Cotters description (Sheen, R F 2005.02.17 Mss: Um Im 12). CAVE DESCRIPTION 2005.02.17b: Depth 50 m ±5, Length 50 m ±5 (Brooks, S J 2005 undated Mss amendment (ballpoint pen) to Sheen 2005.02.17 Mss: Um Im 12). CAVE DESCRIPTION 2005.05.28: Blind shaft, 50 m deep (Arbenz, T 2005.02 Mss: Abstracts 2005-02.xls). CAVE DESCRIPTION 2005.08.20: A clean shaft, approximately 3 m in diameter, drops about estimated 50 m. See Brian Cotters description (Sheen, R F 2005.08.20 Mss). CAVE DESCRIPTION 2005.10.05: Survey 2005 10.00, Survey Total 10.00, Vertical Range 10.00 (Brooks, S J 2005.10.05 Mss: Meghalaya 2005 Survey Summary).rth down into a depression for 120 m. The shaft is located in pinnacle karst on the east side of the depression (Sheen, R F 2005.08.20 Mss). CAVE DESCRIPTION 2005.02.16: A calcite lined 35 m pitch (Jarratt, A R 2005.03.06 Mss -Cave Log- vol. XII, 16/2/05). CAVE DESCRIPTION 2005.02.17: A clean shaft, approximately 3 m in diameter, drops about estimated 50 m. See Brian Cotters description (Sheen, R F 2005.02.17 Mss: Um Im 12). CAVE DESCRIPTION 2005.02.17b: Depth 50 m ±5, Length 50 m ±5 (Brooks, S J 2005 undated Mss amendment (ballpoint pen) to Sheen 2005.02.17 Mss: Um Im 12). CAVE DESCRIPTION 2005.05.28: Blind shaft, 50 m deep (Arbenz, T 2005.02 Mss: Abstracts 2005-02.xls). CAVE DESCRIPTION 2005.08.20: A clean shaft, approximately 3 m in diameter, drops about estimated 50 m. See Brian Cotters description (Sheen, R F 2005.08.20 Mss). CAVE DESCRIPTION 2005.10.05: Survey 2005 10.00, Survey Total 10.00, Vertical Range 10.00 (Brooks, S J 2005.10.05 Mss: Meghalaya 2005 Survey Summary).

Documents

Bibliography 06/01/2018

Histoire

EXPLORATION HISTORY: 2005.02.08, trip 1: Robin F. Sheen and Christian Fischer noticed the entrance. 2005.02.16, trip 2: Brian McCoitir rigged and descended the first 30 m or so (Anthony 'Tony' R. Jarratt 2005.03.06 Mss: Cave Log, vol. XII, 16/2/05). 2005.02.17, trip 3: Brian McCoitir and Anthony 'Tony' R Jarratt descended, explored and 'surveyed' (Sheen, Robin F 2005.08.20) to a degree yielding lengthwise measured metres. Anthony 'Tony' R. Jarratt (2005.03.06 Mss: Cave Log, vol. XII, 16/2/05) explains: A hearty drinking night … After a late start I followed Brian down the 28 m Frog Pot, surveying as we went. Brian rigged the next 14 m pot to reach a mud floor and short climb up. To surmount this, I abseiled down and he pulled me over to reach the top by pendulum technique. A drop down beyond led to another short climb up into a glittering calcite contend aven with no passable way on. The total survey length was 67.18 m but on the way out I spotted a possible passage ona ledge a few metres down from the entrance. I went out while Brian checked this whilst de-rigging to find another pitch. He rigged and descended this to find himself in the glittering calcite aven found earlier so he later estimated a survey leg for the pitch of 30 m. He also worked hard to de-rig the cave while I sat at the entrance trying to light a fire to drive off the mosquitos and being entertained by a squirrel and a bat. BYRON (1813: Bride of Abydos) adds: And oft around the cavern fire / On visionary schemes debate / To snatch the Rayahs [note 2] from their fate. Herbert Daniel Gebauer - 06/01/2018

Cavités proche

Distance (km)	Nom	Longueur (m)	Profondeur (m)
0.2	UM IM CAVE 08
0.2	UM IM CAVE 09
0.2	UM IM CAVE 11
0.3	UM IM CAVE 05
0.3	UM IM CAVE 06 LOST WORLD CAVE
0.3	TYRE CAVE 3
0.3	SIEJ, Shnongrim, 3rd (Krem)
0.4	UM IM CAVE 15
0.4	TYRE CAVE 2