Sinking Stream - A stream that flows in a valley that terminates in a headwall beneath which the stream plunges underground into an underground water system. Soda Straws - are first staged stalactites. They are thin-walled, hollow tubes about 0.5 inches in diameter. They grow from ceilings of caves as water runs down inside them and deposits rings of calcite at their tips. Solutional Caves - caves formed in rock that can be dissolved by acidic groundwater.
Most solutional caves form in limestone, dolomite, gypsum, and marble.
Solutional Pockets - solution pockets are short holes located along joints in the walls or ceilings. Speoleogy - is the study of caves, and their enviromnent. Speoleologist - people who study the formations, geology, and hydrology of caves and their environment. They are features, such as stalactites and stalagmites, formed by minerals being deposited into the cave. Sometimes called formations.