The fonds consists of correspondence from 1942-1995; personal papers from 1935-1941; lecture/administrative material from 1950-[196-?]; soil and rock research from 1943-1994; earthquake research from 19[76]-1990; volcano research from 1947-1993; glacial research from 1932-1993; coal research from 1977-1980; uranium research from 1977-1980; BC Power Commission from 1957-1967; and photographs from 1912-1977.

The fonds consists primarily of material accumulated during a survey of Hong Kong undertaken by the Department of Geology between 1923 and 1933. It is composed of notes, maps and reports generated by Brock and his associates. There are also some papers from the files of the Department of Geology. The papers have been roughly sorted according to form. Also included are several non-UBC publications initially kept in the Brock family library.