1) Sedimentary rock
Found on
https://www.crosswordclues.com/clue/puddingstone
[rock] Puddingstone, also known as either pudding stone or plum-pudding stone, is a popular name applied to a conglomerate that consists of distinctly rounded pebbles whose colors contrast sharply with the color of the finer-grained, often sandy, matrix or cement surrounding them. The rounded pebbles and the sharp contrast in color gives th...
Found on
http://en.wikipedia.org/wiki/Puddingstone_(rock)
No exact match found.
