Definitions
Century Dictionary and Cyclopedia
- n. A stalactitic variety of calcite. See stalactite.
Wiktionary
- n. geology An isolated fragment of rock found within a sedimentary rock (that had fallen, rather than being carried along)
Etymologies
- drop + stone (Wiktionary)
Examples
“First, they have a variety of data flags, including flags for turbidity, earthquake, drainage event, and dropstone, indicating that the particular data point is not to be used.”
“The dropstone group gathered a 150 graduation speeches together and attempted to code and extract "meta-advice" by combining the insights together.”
“PS I mapped a few thousand sq miles of late Precambrian in the Richtersveld, just inside South Africa years ago, which was older than the Nama and included the Numees tillite in which I found a stromatolite in associated dolomite, and also a dropstone and varves.”
The Cambrian as an evolutionary exemplar - The Panda's Thumb
Lists
These user-created lists contain the word ‘dropstone’.
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I Can't Believe It's Not Listed
Words that, at the I put them here, weren't being listed by anyone else in the entire universe.
vagus, neoplanet, fadiddy, cazique, catastroika, circumciser, commonplace book, danseuse, ecopod, dichloroacetate, underlay, overlay and 374 more...
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Geologic Delights
hoodoo, tafoni, scree slope, porphyroclast, phenocryst, porphyroblast, fiamme, tephra, pele's hair, pingo, glacial flour, dropstone and 13 more...
Tweets
Looking for tweets for dropstone.

reesetee Nifty! Oct 2, 2008
bilby "Each of these layers defines an annual accumulation of sediment. Varved sediments may contain dropstones, which are fragments of rock that have dropped from an overlying floating ice sheet and that have sunk into and depressed the layers beneath them."
- Encyclopaedia Britannica. Oct 2, 2008