And, more wonderful still, how did the regular dendritic bundles, so delicate that they are removed by a breath, remain perfect, and endure until they were imbedded in calcareous spar?
I found among the debris in the abyss, pieces of hornstone, and crystals of calcareous spar, radiated quartz, sulphuret of zinc, and sulphate of lime.
Occasionally, masses of calcareous spar occur; less frequently, sulphate of barytes, green iron earth, and ochrey brown oxide of iron.
These masses are penetrated by numerous seams and lines of calcareous spar, sometimes radiating star-like, or intersecting each other irregularly.
Another variety was of a dull- red colour, having a claystone brecciated basis, including specks of oxide of iron and of calcareous spar, and amygdaloidal with green earth: there were apparently several other varieties.
This layer was formed of two plates of calcareous spar, which had evidently lined the opposite walls of a vertical cavity.
At the entrance of the Quebrada Seca we remarked great masses of primitive saccharoidal limestone, tolerably fine grained, of a bluish tint, and traversed by veins of calcareous spar of dazzling whiteness.
There was no crevice near, or any vestige of calcareous spar.
The associated minerals of most prominence are sulphate of barytes, sulphuret of zinc, calcareous spar, and crystallized quartz, chiefly in radiated crystals.
The sulphate of barytes, calcareous spar, and white crystalline masses of quartz, characterize the uplands.
They are often accompanied by the sulphate of barytes, or by calcareous spar; sometimes by blende, or iron pyrites.
Calcareous spar occurs in colourless crystals or crystalline masses; dissolves with effervescence in muriatic acid; is scratched by soft iron, but not by the nail; specific gravity 2.
We passed two small hillocks of milkwhite quartz; fragments of this rock, as well as of calcareous spar, were often observed scattered over the ground.
The calcareous sandstone consisted of grains of quartz cemented by calcareous spar, and contained fragments of shells of the littorina or turbo.
In the left bank at the camp I found a conglomerate rock, consisting of water-worn fragments of serpentine and trap, cemented by calcareous spar.
We have strata consolidated by calcareous spar, a thing perfectly distinguishable from the stalactical concretion of calcareous earth, in consequence of aqueous solution.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "calcareous spar" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
