fluorspar - front of thrust
- fracture hypothesis
- fracture identification log
- fracture joint spring
- fracture of shearing type
- fracture openings
- fracture pattern
- fracture plane
- fracture spring
- fracture without displacement
- fractured formation
- fractured ground
- fractured reservoir
- fractured surface
- fractured volcanic cone
- fractured zone
- fractured-type reservoir
- fractured/crush zone
- fractureless
- fractureless reformation
- fracturing
- fragile ice
- fragile minerals
- fragility
- fragipan
- fragment
- fragmental
- fragmental peat
- fragmental product
- fragmental texture
- fragmentals
- fragmentary
- fragmentary data
- fragmentary ejecta
- fragmentary geological record
- fragmentary material
- fragmentation analysis
- fragmentaulic
- fragmented rock
- fragmenting of continents
- fraipontite