Pudding Stone
Puddingstone is a conglomerate of contrasting pebbles that were rounded by the waves of oceans. They were stuck together by a sediment that became quartzite, filled with silcrete (dissolved silicate mixed with sand), and when they were put under immense pressure and heat throughout a long stretch of time, this created pudding stone. Although, cement, clay and other earth elements can be mixed in depending on where they’re located.
The name originated from the fact that pudding stone looked like plum pudding, and the containment for the stones (the stuff made from silcrete, clay, cement, etc) is called a “matrix”.
This puddingstone was formed by more rounded pebbles and flint.
This conglomerate was found in Canada, containing red jasper quarts.
This puddingstone is from the Triassic era, with grey breaks up of limestone, held within a reddish brown matrix.
Even on mars there is evidence of puddingstone on Mars, and they look similar to earth.
https://www.hertsgeolsoc.ology.org.uk/puddingstone.htm
https://project.geo.msu.edu/geogmich/Puddingstones.html