Term: conglomerate, crag or puddingstone (mining)
Definition:
Rocks composed of rounded masses, pebbles and gravel cemented together by siliceous, calcareous, or argillaceous cement.
View pictures relating to mining at Wisconsin Historical Images.
[Source: "Glossary of Miners' & Mineral Terms" in St. John, John R. A True Description of the Lake Superior Country ... (New York, W. H. Graham, 1846).]