The collection includes fossils, minerals and rocks from the Quaternary, Paleogene and Cretaceous periods of Hampshire and Isle of Wight. There are also some specimens from other UK geological periods mainly collected over 100 years ago.
Early collections include those made by William Curtis, Herbert Druitt, George Willis and Reginald Hooley. They include Quaternary mammals, Paleogene molluscs, particularly from Barton on Sea, and Late Cretaceous echinoderms from various Hampshire Chalk localities. Other collections made by these individuals include an important collection of silicified molluscs from the Cretaceous of Devon and Early Jurassic Cephalopods from Dorset and Yorkshire.
More recent collections and individual specimens obtained by the service fall within the current collecting policy. These collections include important contributions particularly to the Paleogene and Cretaceous record made by Brown, Carlos, Cecil, Clasby, Cooper, Dunleavy, Field, Forhead, Gardner, Godwin, Hoges, Hole, Jurd, Jennings, Jervoise, Kemp, King, Leng, Locke, Lucas, McAlwane, McCreath, Mintram, Morley, Mullis, Newman, Perry, Pullman-Endean, Schlater, Simonds, Sims, St John Burton, West, Westlake and Zachariades.
The contribution made by these individual collectors continue to provide new, previously unrecorded information on the geology of Hampshire, including new localities, abundance, diversity, distribution and preservation of the fossil faunas.