The color was about right, and he knew datolite was found in igneous rocks of volcanic origin.
"The Flaming Mountain" by Harold Leland Goodwin
It is superfluous to cite localities for them as they are among the commonest of igneous rocks.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 6" by Various
In Bohemia, North America and Canada igneous rocks have been observed.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 1" by Various
They contain a great variety of sediments and igneous rocks.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 2" by Various
The first are the Igneous rocks, which means rocks made by fire.
"The Geological Story of the Isle of Wight" by J. Cecil Hughes
Igneous intrusions consist only of unimportant dikes of trap.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 3" by Various
Of these igneous rocks I shall treat more particularly in another part of this work.
"A Manual of Elementary Geology" by Charles Lyell
Its importance consisted in proving that serpentine was, or rather had been, an igneous rock.
"Charles Lyell and Modern Geology" by Thomas George Bonney
Pratt as basic segregations from an igneous magma.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3" by Various
The zeolites occur very commonly in cavities in igneous rocks, and also in mineral veins.
"Geology" by James Geikie
Highcalcium pyroxene as an indicator of igneous differentiation in asteroids and meteorites.
Meteoritical and dynamical constraints on the growth mechanisms and formation times of asteroids and Jupiter
Fine-grained CAI with nodular tex ture shown in the inser t. H . Hibonite-glass CAI spherule. I. Coarse-grained u ltra-refractory igneous CAI E101,1 (ElGoresy et al. 2002). A ll objects are from the Efremovka carbonaceous chondrite, excep t H from the Murch ison carbonaceous chondrite.
Meteorites and the physico-chemical conditions in the early solar nebula
Takeuchi, B. W.S. Lau, Electric Currents Streaming out of Stressed Igneous Rocks – A Step Towards Understanding Pre-Earthquake Low Frequency EM Emissions, Special Issue “Recent Progress in Seismo Electromagnetics”, Guest Editors M.
Skopje and Sofia 2005 Earthquake and Geomagnetic data and the Geomagnetic Quake as Imminent Reliable Earthquakes Precursor