
The conglomerates are composed of detrital rocks bound by a natural cement. They are composed of different rocks fractured by erosion. These rocks are generally sedimentary (as here) but can also be of volcanic origin. There are various conglomerates. Here its a breach, the rocks are angular. If the stones are pebbles, it is called "pouding" and if angular stones and pebbles are mixed, it is called "tillite".