stalagmites

I believe that specific formation is caused by a bunch of thin stalagmites and stalagtites joining against the wall to create that effect.

Quick Overview « Sunrise over the iceberg 2008

The crust which is often deposited by waters which have drained through limestone rocks, in the form of what are called stalagmites and stalactites, is carbonate of lime.

Autobiography and Selected Essays 2003

The crust which is often deposited by waters which have drained through limestone rocks, in the form of what are called stalagmites and stalactites, is carbonate of lime.

Autobiography and Selected Essays Huxley, Thomas Henry, 1825-1895 1909

The crust which is often deposited by waters which have drained through limestone rocks, in the form of what are called stalagmites and stalactites, is carbonate of lime.

The Best of the World's Classics, Restricted to Prose, Vol. VI (of X)—Great Britain and Ireland IV Various 1885

Meanwhile, the water which drips on to the floor also leaves some carbonate of lime where it falls, and this forms a pillar, growing up towards the roof, and often the hanging stalactites and the rising pillars (called stalagmites) meet in the middle and form one column.

The Fairy-Land of Science Arabella B. Buckley 1884

The crust which is often deposited by waters which have drained through limestone rocks, in the form of what are called stalagmites and stalactites, is carbonate of lime.

Young Folks' Library, Volume XI (of 20) Wonders of Earth, Sea and Sky Various 1880

The crust which is often deposited by waters which have drained through limestone rocks, in the form of what are called stalagmites and stalactites, is carbonate of lime.

Lay Sermons, Addresses and Reviews Thomas Henry Huxley 1860

The crust which is often deposited by waters which have drained through limestone rocks, in the form of what are called stalagmites and stalactites, is carbonate of lime.

Autobiography and Selected Essays Thomas Henry Huxley 1860

Farther away, on the other side of the graveyard, pipes rise from a slab like slender stalagmites.

Miracles, Inc. T.J. Forrester 2011

They stumbled through the passage that Caithe had found, trading the terrors of an underground river for the annoyance of stalactites hitting their faces and stalagmites jamming their toes.

GuildWars Edge of Destiny J. Robert King 2011