Agglomerate

Agglomerate is a volcanic rock, sometimes referred to as a pyroclastic rock which is composed of various pieces of volcanic debris and vary depending on the type of volcanic or volcanic activity which produced them. They are often found in and around volcanic vents and appear to look like volcanic breccias, due to the processes in which they form, agglomerates usually exhibit poor sorting of clasts, which sizes and orientations being random, they will also contain various pieces of igneous rocks embedded within an ash or tuff matrix. These particular specimens belong to the Upper streaky andesite series and come from Glen Coe, Scotland, UK, offered in various sizes, each rock specimen will come supplied in a card tray with an information label.