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Grierfield Cave

February 11, 2010

District: Grierfield

Parish: St Ann

WGS84 L/L: 18 15 19.8, 77 09 00.6

JAD2001: 734120 E, 678286 N

JAD69: 234009 E, 177997 N

Altitude: Undetermined

Accuracy: +/- 20m horizontal; +/- N/A vertical


Type: Chamber (from JU)

Accessibility: Vertigear

Depth: 6m (from JU)

Length: 20m (from JU)

Explorers: GSD

Survey: None

JU Ref: pg 190

JU Map: N/A

Entrance size: 6m W, 2m H

Entrance aspect: 90

Vegetation in general locale: Scrub/farm

Vegetation at entrance: Scrub

Geology: White limestone

Bedding: Undetermined

Jointing: Undetermined

Speleothems: Undetermined

Palaeo resources: Undetermined

Archaeo resources: Undetermined

Hydrology: Dry

Dark zone: Undetermined

Climate: Undetermined

Bats: Undetermined

Bat guano: Undetermined

Guano mining: Historical

Guano condition: Undetermined

Visitation: Rare

Speleothem damage: Undetermined

Graffiti: Undetermined

Trash: Undetermined

Ownership: Undetermined

Protection: None

Vulnerability: Undetermined

Grierfield Cave
February 11, 2010
Team: RS Stewart
Notes: RS Stewart

Grierfield Cave was found on February 11, 2010, as part of NEPA's St Ann bat netting project. As with most GSD positions, the coordinates given in Jamaica Underground are inaccurate in the extreme, in this case out by 1.58 km. There is no doubt in my mind that I had the right site - the description and local info are a perfect match. I did not enter the cave for reasons that will become obvious further in the report, but it is on the to-do list.

The Jamaica Underground entry is quoted below: "On Griefield property, west of the road to Gibraltar. A 20m ladder needed to enter a 6m diametre hole 15m from the clifftop. Some guano was mined here, but operations proved too difficult."

A little asking around in Griefield soon resulted in information, and actual guidance to the area close to the cave by a man named "Manners", done pro bono. Indeed, if I had first driven down the road a little more I would have found it myself - the entrance is visible from over a km away, since it is about two-thirds of the way up a prominent cliff. We drove to a spot on the nearest backroad that was due east of the cave, where I recorded a position, and took a bearing with the survey compass. This was later used with Ozi to plot the actual entrance on the 1:50k topo map (the cliff shows well because of the tight contour lines).

My guide confirmed that guano had been taken out in the past using a ladder for access, and that some of the locals had occasionally accessed the cave by climbing trees growing at the base of the cliff.

I could not tackle the vertical work required to enter the cave because I was on my own (other than the guide), but it will be done in the future when others in the group are with me. Unfortunately, I had to inform Andrea Donaldson that netting would be impossible unless they hung from ropes in front of the cave while doing it. I'm not sure if I would even attempt that myself.

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