Between 1983 and 1985 a field survey and 2 excavations were carried out on Anglezarke by the Cumbria and Lancashire Archaeological Unit. Noted in the survey as Site 40 was reference to a chambered round cairn on Sronstrey Bank at Black Coppice (overlooking White Coppice). I have looked twice in the past 10 years, but using the map in the survey and a gps app on my phone, finally tracked it down to start recording it. The report states: The chambered round cairn (site 40) is of an unusual type. It is a large, slightly pear-shaped, prominent cairn and has a chamber formed by a large unworked slab, used as a capstone. This stone slopes down to the ground at the back, but is supported at the front by an upright portal on one side, and the body of the cairn on the other. Although the chamber is incorporated with a cairn and is not free standing, there are similarities with some of the megalithic tombs of north Wales.
Have a look at the cairn yourself. Click the Play button and move the model around to view it. Disappointing first results for the 3D model. The software seems to struggle to recreate the entire covering slab.
I carried out a drone survey to determine the overall shape of the cairn which you can view in the 3D model below.
The first elevation models produced did not show the shape of the cairn as the whole side is on a slope. By placing the model flat, I was able to produce the following hill shade image which shows the cairn to be more circular that it appears on the ground.