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Megalithic Dolmens - (Also called Muniyaras), these dolmenoid cists belong to the Megalithic age. These dolmenoids were burial chambers made of four stones placed on edge and covered by a fifth stone called the cap stone. Some of these Dolmenoids contain several burial chambers, while others have a quadrangle scooped out in laterite and lined on the sides with granite slabs.
from: http://ezinearticles.com/?Guide-to-Megalithic-Dolmens-and-Rock-Paintings-In-Kerala&id=6096280
