 | | Report (issue) | | University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Conservation and Survey...Gemstones of Nebraska: A Handbook for Students and Collectors Roger K. Pabian University of Nebraska - Lincoln...Lincoln, rpabian1@unl.edu Allan Cook University of Nebraska - Lincoln Follow this and additional works at:...K. and Cook, Allan, "Minerals and Gemstones of Nebraska: A Handbook for Students and Collectors" (1976)...Resources, School of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion |  | | Report (volume) | | Forination ___ -----------------------------------------Brock Canyon Forination_______________________________________..._ ___ ___ ________ __ __ _____________________ Brock Canyon Forination in the Dry Hills____________________...2-4. Photomicrographs: 2. Arkosic wacke of the Brock Canyon Formation__________ 11 3. Typical volcanic...breccia__________________ 12. Contact of the Brock Canyon Formation and the Brock Canyon pluton------------------...recrystallized and kaolinized arkose (?) of the Brock Canyon Formation from a screen in Doc Creek___ 14 |  | | Report (chapter) | | Aztec Sandstone in the Buffington window, SE Nevada, USA LUISA F. ZULUAGA1,2, HAAKON FOSSEN1,3,4*, GREGORY...Bottom left: location of the study area in Clark county, SE Nevada, with major thrust and strike-slip tectonic...thrust sheet of .2 km (Willemin 1984) or 4–5 km (Brock & Engelder 1977) thickness that moved at least 40...increases towards the thrust, as demonstrated by Brock & Engelder (1977) based on three traverses into... ZULUAGA ET AL. State Park, in Clark County of SE Nevada, USA (Fig. 1). The window is a c. 28 km2 exposure |  | | Report (issue) | | in reflected light, principally from included hematite. Luster: Greasy to vitreous. Optical Class: Uniaxial... X-ray Powder Pattern: Wet Mountains, Colorado, USA; cannot be distinguished from other members of the...Total [100.0] 100.0 (1) Wet Mountains, Colorado, USA; RE2 O3 = Y2 O3 1.27%, CeO2 1.23%, La2 O3 0.49%,...an original total of 102.2% after deduction of hematite 4.6% and insoluble 2.0%; corresponds to (Ca0.43...thorite, zircon, apatite, rutile, hematite. Distribution: In the USA, in a prospect pit about 1 km east |  | | Journal (article/letter/editorial) | | Iron oxide minerals, especially limonite and hematite, are characteristic of these veins and they commonly...amount shown; N.D.--no Thorium veins District or County area State Dipof data] Samples analyzedRocks...02 -12.5 Yes Yes Christman and others (1959); Brock and Singewald (1968). Mountains and Fremont ...Individualveinsare commonlyvariablein thickness. (Singewald and Brock, 1956, p. 584), Mountain For example in the Lemhi...quartz-feldspar-iron oxide- and in the Wet Mountains(Brock and Singewald, thoriumdepositsare tabular,someof |  | | Journal (article/letter/editorial) | | Meshberger Stone quarry, Columbus, Bartholomew County, Indiana; Richard RusseU specimen and photo. significance...(far left). Ara~onite speleothems, Cave, Calaveras County, California; James Patton photo. Moanin~ Downloaded...(from PlIIBche 1943 as toiilpiled and modIied from Brock 1993). Form famly pinil\.'Oid pn'>l1l\ dihexagonal...Cl)'stlll 5.5 em long, Sweetwater mine, Reynolds County. Missouri; Ten')' Huizing spec:imen and pboto....Now that you have the bad news, here is the good. Brock (1993) published a very readable summary of the |  | | Report (issue) | | Arkansas River on the north, the CusterHuerfano County line on the south, the Texas CreekWestcliffe fault...of area in plate 1 (patterned area). Numerous county roads connect the defunct mining communities of...1954; Singewald and others, 1955; Singewald and Brock, 1956; and Christman and others, 1959). Parker and...especially in the Mount Tyndall 7 Vz -minute quadrangle (Brock and Singewald, 1968), the Cotopaxi and Royal Gorge...reported in Staatz and others bearing gneisses. Brock and Singewald (1968) have fur (1979) and in Staatz |  | | Journal (article/letter/editorial) | | Evans at the end of the meeting. Seel, specular hematite and garnet; the Bernard H. Kress, Publicity three...Marion and Marilyn, 4018 Kottler Drive byssolite, hematite, sphalerite crystals, actinLafayette Hill, Penn...Minerals of Franklin and Sterling Hill, Sussex County, New Jersey, reprinted from the paper by Charles...Moselle Mine. W e hope to get many good specimens of Hematite, Limonite, Copiapite, Quartz, Pyrite, Marcasite...Goethite. Plans are under way to adopt the Washington County Agate, sometimes called Potosí Agate, for our official |  | | Journal (article/letter/editorial) | | confirmation of my guess as to the rock I found in Marion County, Florida. "I say it's jasper, flint and agate....From Idaho wilderness area near Stanley in Blaine County, Idaho. Some of these come in very large xls."...that were found in the Warsaw formation, Hancock County, Illinois. These were found in geodes embedded...smoky quartz, barite, aragonite, smithsonite, hematite, selenite, and sphalerite. We have been collecting...Drennon area on the Kentucky River in eastern Henry County, Ky., we have an attractive 4 x 6 inch polished |  | | Journal (issue) | | Photo: 5.1.Pekov. The Baringer Hill Pegmatite Llano County, Texas Art Smith artsmithite@msn.com Introduction...the specimens is meager usually giving just Llano County or 5 miles south of Bluffton. However, when reading...were few other pegmatites recognized in the Llano County area so Baringer Hill can be accepted as their...Baringer Hill pegmatite is located in eastern Llano County about 22 miles to the northeast of the town of..."Baringer Hill'' on them. Most just say: "Llano County'' or ''5 miles south of Bluffton''. The 4 Mineral |  | | Report (volume) | | Maryland Geological Survey: Kent County; Queen Anne's County; Talbot County. Baltimore, Md. Mazama, vol....GEOLOGY, 1925-1926 Nebraska Geological Survey: vol. 8. Lincoln, Nebr. Nebraska State Museum: Volume...6. Carbonic flora of Butler's Landing [Johnson County, Iowa] (abstract):.' Pan-Am. Geologist, vol. 46...the Illinoian drift margin in southeastern Owen County, Indiana: Indiana Acad. Sci.. Proc.,. vol. 35,...Sand fulgurites from Nebraska, their structure and formative factors: Nebraska State Mus., Bull. 7, vol |  | | Report (issue) | | Arkansas River on the north, the Custer-Huerfano County line on the south, the Use fault on the east, and...metasedimentary rocks are also considered Precambrian by Brock and Singewald (1968). Abstract for this paper was...deposits in the area south of the Fremont-Custer County line generally trend northwest-southeast so that...siderite, rhodochrosite, goethite, magnetite, and hematite, may be abundant. Accessory minerals include phlogopite...side of the slide. Barite and probably specular hematite are also present. Heavy mineral separates of this |  | | Journal (article/letter/editorial) | | CARBONATITES OF THE ARKANSAS RIVER CANYON, FREMONT COUNTY, COLORADO. 3. THE AMETHYST CARBONATITESl E. Wu...Amethyst carbonatites in 12 Mile Park, Fremont County, Colorado are the northernmost representatives...Colorado (Christman el, al., 1959; Singewaldand Brock, 1956;Heinrich, 1958).During this period a group...Geological map of the Amethyst carbonatite area, Fremont County, Colorado AMDTHYST CARBONATITES MAP OF THE GEOLOGIC...GEOLOGIC AMETHYSTSILICO-CARBONATITE FREMONT COUNTY, COLORADO Geologyby E Wm Heinrichond O H Dohlem J |  | | Journal (issue) | | 271 THE GEOLOGY OF SPRING MOUNTAIN IN MONTGOMERY COUNTY, PENN. By Rich1nond E. 1'1yers ..................collectors has been drawn to the Mammoth area, Pinal County, in the sot1thern part of Arizona. ActualJy it...a chemical anomaly. A single find of micaceous hematite (specularite) as a drusy coating in fine cracks...milky, aventurine) , Chalcedony, Cacholong, Ice, Hematite, Specularite, ~iagnetite, Dendrite, Limonite,...interest in something unrelated A Message From Mr. Brock to self. If this is being queer we must admit some |  | | Report (issue) | | 1640 tOccurred April 29, 1903, McConnell and Brock and Rice (1912, topographic map) (1904, p. 6, 11)...the U. S. Geological Survey, in San Bernardino County, approximately 85 airline miles east of metropolitan...San Bernardino through Big Bear Lake. The paved county road from Lucerne Valley to Yucca Valley passes...usually much recrystallized and stained deep-red by hematite and limonite. Most of the mines in the area are...faults in the marble; the ore is the red, clayey, hematite-rich gouge, which carries some gold and silver |  | | Journal (article/letter/editorial) | | leucocraticcomplexat DemocratCreek. They have been mappedby Brock and Singewald (1968) as Precambriangabbroicgneisses...Fluorite CaF• R -- Galena PbS VR -- Goethite Hematite HFeO• Fe•Oz M C M C Ilmenite FeTiOz VR ...meritcontent,chlorite,epidote,fluorapatite,goethit. hematite,lepidocrocite, microcline,rutile, siderit, ubiquitous...Fairlyabundant monazite and ankerite are sparse. Quartz, hematite,and foundin the carbonatite plugnearGemPark at...Gulch, Wet Mountains alkalic province, Fremont County, thorite, strontianite,galena,and cerussitein primary |  | | Book (volume) | | - 268 Black Hematite, 26’9 stone, 289 15. Pitchy Iron-Ore, 258 Brown Hematite, 285 14. Bog...Clay-Iron¬ stone, Common Iron Glance, 233 Red Hematite, 279 JasperyClay-Ironstone, 284 232 ous Iron-Glance...106. Id. Lam. t. i. p. 96.—Le Platlne natif, Brock, t. ii. p. 86.—-Platin natif ferrifere, Hauy, t...Estner, b. iii. s. 215.—-L’Or natif, jaime d’Or, Brock, t. ii. p. Sp.— Gold-gelbes gediegen Gold, Reuss... and in a ferruginous sand near Arklow, in the county of Wicklow, where a mass weighing twenty-two ounces |  | | Journal (article/letter/editorial) | | SETTING OF THE GRANITIC PEGMATITES OF NEW YORK STATE, USA Marian V. LUPULESCU§ Research and Collections, New...New York State Museum, Albany, New York 12230, USA Jeffrey R. CHIARENZELLI Department of Geology, St...13617, USA David G. BAILEY Geosciences Department, Hamilton College, Clinton, New York 13323, USA Abstract...mlupules@mail.nysed.gov Bedford in Westchester County around 1878 (Newland 1905). The second stage of...Inwood Marble sits the Ned Mountain Formation (Brock & Brock 2001). The felsic component of the Ned Mountain |  | | Journal (article/letter/editorial) | | reported in this paper expands on an earlier study by Brock et al. (1972) using modern demagnetization and analysis...S12 sampling site (S denotes this study, numbers Brock et al., 1972) Kaapvaal Craton KC7= Site of Kavirondian...by white squares and letter S#. Sites sampled by Brock et al. (1972) are given by site number (see Table...sequence. In this paper, we update the results of Brock et al. (1972) who used mainly blanket Af-demagnetization...questioned by Brock et al. (1972) and Brock and Piper (1972). In companion papers, Brock et al. (1972) |  | | Report (volume) | | H.) and Smith (A. F.). 1. The geology of Miller County [Missouri]. Mo. Bur. Geol. & Mines, 2d ser., vol...deposits. Bendrat (T. A.). 1. The geology of Lincoln County, South Dakota, and adjacent portions... Am. Geol...character of the saccharoidal sandstone in Missouri. Brock (R. W.). 1. Original native gold in igneous rocks...of British Columbia in which platinum occurs. Brock (R. W.), McConnell (R. G.) and. 1. Report on the...landslide at Frank, Alberta. See McConnell (R. G.) and Brock (K. W.), 1. Broili (Ferdinand). 1. Permische Stegocephalen |  | | Journal (article/letter/editorial) | | Western Washington University, Bellingham, WA 98225, USA; mustoeg@wwu.edu; Tel.: +1-360-650-3582 Received:...include calcite, apatite, iron pyrites, siderite, hematite, manganese oxide, various copper minerals, fluorite...that contains quartz-filled fractures (Washington, USA) to silicified wood that contains abundant copper...Western Washington University, Bellingham, Washington, USA. Specimen photos provided by other researchers are...running Genesis software (EDAX, Mahwah, New Jersey, USA) and X-ray diffraction patterns performed with a |  | | Journal (article/letter/editorial) | | 1637 Paleomagnetism of basic intrusions from the Brock Inlier, Northwest Territories, canadal Can. J....accepted June 10, 1981 Basic intrusions of the Brock Inlier of the Northwest Territories are shown by...conjunction with vector diagrams. A presumably hematite component antiparallel to AR was recovered at...palComagnktique que les intrusions basiques de la fenktre Brock dans les Territoires du Nord-Ouest sont relikes...Lake intrusions of a similar nature occur in the Brock Inlier. It had been suggested through both geological |  | | Journal (article/letter/editorial) | | petrographic evidence that all occurrences of hematite are in the form of ferrimicrobialites constituting...2017; Reitner, Langsford, & Kruse, 2017; Skovsted, Brock, Topper, Paterson, & Holmer, 2011). If the Red Crust...in the Donkey Bore Syncline (Topper, Skovsted, Brock, & Paterson, 2007), at Wirrealpa (Haslett, 1976)...cementation. The only Fe-bearing mineral present is hematite. An example of well-laminated ferrimicrobialite...Gravestockia within the Red Crust contain some hematite; this could be due to post-mortem ferrimicrobial |  | | Report (volume) | | A. Buehler, Rolla. Nebraska.........Prof. E. H. Barbour, University of Nebraska, Lincoln. Nevada......See Bauxite and Hallpysite. Asbestos. Tallapoosa County, with corundum deposits near Dudleyville; not found...commercial quantity or quality. Asphalt. Colbert County, small quantity has been shipped from near Leighton;...following localities: Bibb County, Pratts Ferry; Calhoun County, near Tampa; Clay County, T. 20, Pv. 7 E.; Jefferson...Jefferson County, at Elyton; Lee County, at Chewacla lime works; St. Clair County, at Gfeensport; Shelby |  | McKee, Edwin D., Crosby, Eleanor J., With contributions by Ferm, John C., Keller, Walter D., Schopf, James M., Walker, Theodore R., Wanless, Harold R., Wright, Cynthia Roseman, , (1975) Paleotectonic investigations of the Pennsylvanian system in the United States, Part II: Interpretive summary and special features of the Pennsylvanian system. Professional Paper 853. US Geological Survey doi:10.3133/pp853 | Report (issue) | | north-south orientation. Such structures include the Nemaha anticline, the Mississippi River arch, and the...structural features such as the Mississippi River arch, Nemaha anticline, central Kansas uplift, and Cambridge...margins (pi. 3A) except near the south end of the Nemaha anticline. This area was probably buried during...separated regions. The Forest City basin of Iowa, Nebraska, and Kansas began to form in what earlier had...anticlinal extension of the Cambridge arch of Nebraska. This tectonism locally and briefly interrupted |
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