Type of physical feature that your sample was collected from
- abyssal feature
- alluvial fan
- anticline
- aquifer
- arch (natural formation)
- arroyo
- badlands
- bank (hydrographic)
- bar (physiographic)
- basin
- bay
- beach
- bight
- canyon
- cape
- cave
- channel
- cirque
- cliff
- continental divide
- continental margin
- crater
- delta
- drainage basin
- drumlin
- dune
- earthquake feature
- estuary
- fault
- fault zone
- flat
- floodplain
- fold (geologic)
- fracture zone
- gap
- gulf
- gut
- hydrothermal vent
- ice mass
- isthmus
- karst area
- lake
- lava field
- ledge
- massif
- mesa
- mineral deposit area
- moraine
- mountain
- mountain range
- mountain summit
- ocean trench
- outcrop
- plain
- plateau
- playa
- reef
- ridge
- rift zone
- roadcut
- seamount
- sea
- stream
- submarine canyon
- syncline
- thermal feature
- valley
- volcano