. Baltimore county. Geology; Mines and mineral resources; Physical geography; Forests and forestry. Maryland Geological Survey 121 I. Porphyritic lherzolite. Johnny Cake Road, Baltimore County. Analyst, T. M. Chatard, U. S. Geol. Surv., Am. Geol., vol. 6, p. 39, 1890. II. Websterite (hypersthene-diallage). Johnny Cake Road, Baltimore County. Analyst, J. , U. S. Geol. Surv., Idem, p. 41. Ill & IV. Websterite (bronzite-diopside). Hebbville, Baltimore County. Analyst, J. , U. S. Geol. Surv., Idem. V. Feldspathic lherzolite. Dike on Western Md. R. R. near Pikesville, Balt
. Baltimore county. Geology; Mines and mineral resources; Physical geography; Forests and forestry. Maryland Geological Survey 121 I. Porphyritic lherzolite. Johnny Cake Road, Baltimore County. Analyst, T. M. Chatard, U. S. Geol. Surv., Am. Geol., vol. 6, p. 39, 1890. II. Websterite (hypersthene-diallage). Johnny Cake Road, Baltimore County. Analyst, J. , U. S. Geol. Surv., Idem, p. 41. Ill & IV. Websterite (bronzite-diopside). Hebbville, Baltimore County. Analyst, J. , U. S. Geol. Surv., Idem. V. Feldspathic lherzolite. Dike on Western Md. R. R. near Pikesville, Balti- more County. Analyst, Leroy McCay. Princeton College, Princeton, N. J., idem, p. 39. The chemical composition of the bronzite and diopside composing samples III and IV is given below: SiO,.. Al,Os. Fe203. MgO. Na,0. K, H, TiO,.. CrsOs. MnO. Specific gravity. I. Bronzite 1 Analyses made by T. M. II. Chrome Survey, Idem, p. 42. Chatard, U. S. Geological Alterations of Pyroxenites and Peridotites Serpentine.—The Bare Hills and Soldiers Delight serpentine areas are examples of serpentinized peridotite. They are characterized by a scanty vegetation of pine and cedar growing in a thin gray soil mantled in spring with the purple ground pink or Phlox subaculata that is so typical of areas underlain by serpentine rocks. The name "Bare Hills" strikingly expresses the contrast between the barren and rugged appearance of the serpentine areas as contrasted with the more fertile farming country that surrounds Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Maryland Geological Survey; Berry, Edward Wilber, 1875-1945; Knopf, Eleanora Frances Bliss, 1883-; Jonas, Anna I. (Anna Isabel), 1881-; Mathews, Edward Bennett, 1869-; Watson, Edward Hahn, 1902-; Carter, Wil
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