"animal exclusion" theory - advance heading
- above-background gold
- above-shelf area
- abradant
- abrade
- abranchial
- abranchiate
- abrasion
- abrasion hardness
- abrasion platform
- abrasite
- abrasive
- abrasive core drilling method
- abrasive water
- abrasives
- abraum salts
- abriachanite
- abrograptid
- abrolhos
- abrupt
- abrupt change
- abrupt discharge
- abruptness
- absarokite
- abscission
- absent cleavage
- absite
- absolute age
- absolute age determination
- absolute altimeter
- absolute amplitude
- absolute block
- absolute chronology
- absolute determinations
- absolute elevation
- absolute gas content
- absolute gravity
- absolute measurements
- absolute methane-bearing capacity
- absolute orientation
- absolute sensitivity