[en] This field guide is designed as a checklist of the types of information necessary in the descriptions of favorable geologic environments and as a rapid reference to the recognition criteria. The criteria of each class and subclass of uranium occurrence described in GJBX-63(78) and GJBX-67(78) are summarized under the following categories: tectonic setting, major regional structures, dominant local structures, host-rock properties, associated rocks, alteration, uranium and uranium-bearing minerals, and related (associated) elements