	*(1905) Mines and quarries, 1902. Department of Commerce and Labor, Washington, D. C.*	Book
	DIRECTOR See erweiwE POR \|S —$<$_____ MINES AND QUARRIES IQO2 PREPARED UNDER THE SUPERVISION CHIEF...1.—Character of inquiries concerning mines and quarries: 1850 to 1902 ...........--..----------.--2-----Table...included in Census reports concerning mines and quarries: 1850 to 1902........--.---.-.--.---Maplers—=Mlininostatistics...aes Table 13.—Productive and unproductive mines, quarries, and wells: 1902.......-..---------------------+------Table...quantity and value of such materials obtained from quarries included under other GlASsiti Caton sal OO 2Re
	Gardner, C.A., Sarna-Wojcicki, A. M. (1989) Guidebook for field trip to the Mount Bachelor-South Sister-Bend area, central Oregon High Cascades. Open-File Report Vol. 1989 (89-645) US Geological Survey doi:10.3133/ofr89645	Report (issue)
	Readout on right exposes a thin layer of 2-ka pumice lapilli from the Rock Mesa vent on South Sister...iron-oxides, notably magnetite, maghemite and hematite. Magnetic stability, or ability to preserve a...coarser grained than the lower unit; individual pumice bombs are as large as 20-30 cm. Lithic fragments...19), which is the source of much of the scattered pumice on the ground surface seen at earlier Day-2 stops...Carver Lake vents. (See notes below) Rock Mesa pumice and n-6 Si02 A120J Fe2O3§ FeOS MgO CaO Na 2 0
	*(1957) Mineral Commodities of California. Bulletin* 176. California State Mining Bureau**	Report (issue)
	rhyolite-f!rauite class. , . . olcanie gla<.:ses, pumice, aud perlite are in this class. The more basic...distriet Group IV Cascade Range and -:\lodoc PJ ateau Pumice and perlite deposits Freshwater clia to mite of...layer Lower Cedarville l\IJNERAL DEPOSIT Perlite Pumice 16 B t.,LLETIX 176-~lD-"ER.ll. ( 41 3-orther...rock Quickill'"er :--onoma ,·olca.nics Perlite, pumice. ,tone building - Quaternary ..,cream gravel...made from n1etals or mineral raw materials. Sand, pumice, and pumicite are the pri11cipal abrasives produced
	Bateman, Paul Charles, Pakiser, L.C., Kane, Martin Francis (1965) Geology and tungsten mineralization of the Bishop district, California, with a section on gravity study of Owens Valley and a section on seismic profile. Professional Paper 470. US Geological Survey doi:10.3133/pp470	Report (issue)
	flows.-__ Bishop tuff -__-_---_--------------Basal pumice layer _______________ Principal tuff member.___...inversely graded layers of pumice resulting from dumping two batches of pumice into a beaker partly full...addition, small amounts of chlorite, epidote, hematite, and sericite are present. Fragments of fine-grained...biotite, sphene, magnetite (partly altered to hematite), and apatite. The amphibole commonly is pleochroic:...are composed chiefly of magnetite and specular hematite. The distribution of these veins with respect
	*Lopes, Rosaly (2005) Volcano Adventure Guide. Cambridge University Press.*	Book
	covered half the island with a thick layer of ash and pumice fragments, but luckily nobody was visiting the...located in the small and rather bleak island of Jan Mayen. Beerenberg has been active five times since 1633...The lucky birthday boy was Kaiser Wilhelm II of Germany, who received it from his generous grandmother...water as was discussed in our “tour,” from Jan Mayen at the north to Bouvet Island near Antarctica. Like... meaning flows of broken magma fragments, ash, pumice, and gas (in volcanological terms, a nuée ardente

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Hematite from Pumice quarries, Wingertsberg, Mendig, Mendig, Mayen-Koblenz, Rhineland-Palatinate, Germany

Hematite from
Pumice quarries, Wingertsberg, Mendig, Mendig, Mayen-Koblenz, Rhineland-Palatinate, Germany