The grikes are formed by rainwater dissolving thin calcite veins that permeate the limestone. The limestone pavement has been scraped clean by moving ice sheets and the blocks of limestone known as clints are separated by fissures known as grikes. Glacio-karst landscape features, which are the combined result of glacial activity and rainwater dissolution features, are abundant around Poulnabrone Dolmen. The bones show signs of wear that suggests hard physical labour was normal for the people of the time and while one hip bone had the tip of an arrow head embedded in it indicating conflict, there is also evidence of creativity and craftsmanship shown in the discovery of a decorated neck pendant. The limestone flagstones which were used to build the monument would have been extracted from the surrounding limestone pavement.Įxcavations by archaeologist Anne Lynch in the 1980’s revealed the remains of 33 people at the site and radiocarbon dating of their bones indicates that the tomb was in continual use for a period of 600 years between 5,200 and 5,800 years ago. The uprights are not wedged into the deep fissures which are common in the limestone. This mound of rocks would have added support to the upright stones which are otherwise only supported by the weight of the capstone. The tomb was built on limestone pavement and surrounded by a low mound of rocks. This part collapsed at some unknown time in the past. A second stone which lies on the ground at the rear of the monument was likely a second capstone which would have fitted in under the main capstone and covered the back of the structure. Portal tombs have two large portal stones standing on either side of an entrance capped with a massive sloping capstone. Poulnabrone is classified as a portal tomb. It is the oldest dated megalithic monument in Ireland. Situated on the high Burren limestone plateau, Poulnabrone Dolmen is one of Ireland’s most iconic archaeological monuments and is the second most visited location in the Burren after the Cliffs of Moher. Burren Slow Food Festival 2022 – GEOfood Launch.Code of Practice for Sustainable Tourism.
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