When a stalactite or stalagmite is deposited it contains a large amount of uranium and no thorium because of differences in the chemical behaviour of these elements.
He collected a stalactite from an underwater cave.
The beautiful stalactite and stalagmite formations in the cave are a sight one would seldom get to see in a lifetime.
Only the tops of a few mountains were left above water, and some of these became the Balearic Islands, with limestone caves full of stalagmites and stalactites .
A pale blue-green mineral tentatively identified as rosasite occurs with the cerussite as botryoidal and stalactitic masses.
Calcite, or calcium carbonate, is the main constituent of limestone and of cave formations such as stalagmites and stalactites .
The largest developed limestone cave in Idaho, Minnetonka Cave offers a variety of stalactites and stalagmites within its walls.
She gazed at the stalactites and stalagmites lining the floors and ceiling of the cave.
Our path is frequently obstructed by various cave things like stalactites , stalagmites, and blind butterbats.
Also noteworthy are the rare stalactitic overgrowths to 20 cm of pale to medium green fluorite cubes formed along earlier ‘strings’ of whitish finely crystalline quartz.