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Jackson's Bay Caves

July 27-28, 2010 (Second of three reports for JBC. July 25 is here. Aug 8-9 is here).



District: Portland Ridge

Parish: Clarendon

WGS84 L/L: By request only

JAD2001: By request only

JAD69: By request only

Altitude: 15m WGS84 (JBC-3)

Accuracy: +/- 5m horizontal; +/- 10m vertical

 

Type: Complex

Accessibility: Walk-in

Depth: JU has 60m but alt of JBC-1 is 30m (?)

Length: >3000m

Explorers: JCC, 1964-77

Survey: JCC

Vegetation in general locale: Scrub

Vegetation at entrance: Scrub

Geology: White limestone

Bedding: Poor

Jointing: Poor

Speleothems: Stals, flowstone

Palaeo resources: Yes

Archaeo resources: Yes

Hydrology: Wet

Dark zone: >99%.

Climate: ~23 deg C, humid.

Bats: >5000(?)

Bat guano: Some

Guano mining: None

Guano condition: Varies (needs work)

Visitation: Occasional

Speleothem damage: None

Graffiti: Some

Trash: None

Ownership: Private (Gun Club)

Protection: None

Vulnerability: High.


Jackson's Bay Caves
July 27-28, 2010
Team: RS Stewart, S Sterling, W Brown
Notes: RS Stewart

Sasha Sterling, Warren Brown, and Stewart spent two days continuing the georeferencing work. Entrance 3 was referenced, the Cistern Series was looked at, and also the Lead On Crawl as far as Roundabout Chamber.

Entrance 3 does not appear to be a preferred exit route for any of the roosts found in JBC, so is low priority for netting. If netting were done, it may be possible with a harp trap. The collapse in which it is located is somewhat small for a mist net.

One of the chambers in the Cistern Series has a moderate number of bats (500+), and substantial deposits of guano that cause poor air. The preferred exit route is probably Entrance 1.

The Lead On Crawl itself has no bats, although it does lead to the eastern section where roosting space is available, and there are additional entrances. We have not yet examined that part of the system.

The JU map suggests that the largest roost in the western section is the Queen Series, and the preferred exit would be through Entrance 9. We have not yet examined that part of the system, although we did find the squeeze that leads to it from the area inside of Entrance 1, and have put a return visit on the to-do list.

Section of the JU area map with 3 of the 3 referencing points. Click for full size.
Section of the JU area map with 3 of the 3 referencing points. Potoo intentionally not shown. Click for full size.

Map of Jamaica showing the location of Portland Ridge. Click for full size.
Map of Jamaica showing the location of Portland Ridge. Click for full size.

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