general/speleothems

Cave-crystallized calcite crusts

Speleothems composed of long needle-like crystals situated in clusters

Cave formation

Speleothem whose axis changes

Elongated mineral formation hanging down from a cave ceiling

Mineral tube formation found in caves

Geological phenomenon

Small nodes of calcite, aragonite, or gypsum that form on surfaces in caves

Spherical speleothem concreted concentrically

Elongate mineral formation found on a cave floor

Shelf-like speleothem