0E1236F73FA83CBDE050CD9B214471B0EnglishData Requests OfficerDepartment of Lands, Planning and EnvironmentGeospatial Services Unit (on behalf of department)Datarequests.DLPE@nt.gov.au2023-10-05AS/NZS ISO 19115 Geographic Information - Metadata, ANZLIC Metadata Profile1.0 Sinkholes of the Northern Territory2014-09-302019-02-21Sinkholes are depressions in the landscape related to collapse features in underlying limestone or dolostone rock formations. These rocks are prone to dissolution by slightly acidic rainwater over geological timescales. Cavities form in the rock ranging in scale from microscopic to cave systems. Sinkholes form when the cavities grow to the extent that the rock above collapses. The reason this dataset was compiled is that sinkholes are a good indicator of underlying limestone or dolostone, which often host important aquifers. The sinkholes provide one method for delineating karstic aquifers which in many cases either outcrop poorly or are covered by younger rocks.Download the spatial data package (contains spatial data, maps and reports) via https://data.nt.gov.au/ You are licensed to use the geospatial products on the terms and conditions set out in: Creative Commons Attribution 4.0 International Public License (CC BY 4.0) at: https://creativecommons.org/licenses/by/4.0/legalcode If you do not agree to the terms and conditions you must not use the geospatial products. You are free to copy, communicate and adapt the licensed material, provided that you abide by the licence terms (including Attribution) and attribute the licensed material using the statement: Supplied by the Department of Environment, Parks and Water Security. Copyright Northern Territory Government. Disclaimer: This dataset should not be used for hazard assessment purposes. The presence of a sinkhole may or may not pose a hazard to infrastructure such as buildings, roads or railway lines. Such assessments should only be carried out by appropriately qualified engineers and would normally involve detailed site investigations.English-26-101291382014-09-302019-02-21datasetnot knownContinually updated and maintained.0not knownSome of the attribute categories such as "Type" are preliminary only and may be changed in the future.0not knownVaries from 3 - 10 metres for sites located with GPS to +/- 250 metres for sites located using satellite imagery. All sinkhole locations defined in this spatial dataset should be field verified for development purposes.0not knownThe accuracy of the sites attribute information is considered low.0The features described here as sinkholes here mainly comprise wide, circular to oval shaped, flat bottomed, shallow depressions. They range in up to 2km in diameter and never have subterranean openings. Many of these hold water during the wet season and some throughout the year. These have mainly been delineated using Google Earth. Other types of sinkholes identified are depressions up to 100m in diameter which may or may not have subterranean openings at their bases and can have steep sides. These have been mapped by field inspections. Caves have also been included in this dataset and have been mapped by field inspections and also taken from previously identified ones on topographic and geological maps.