Needles District

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Journal Article
Journal: GSA Bulletin
Published: 01 June 1978
GSA Bulletin (1978) 89 (6): 952-960.
...DONALD BRANDRETH POTTER, JR.; GEORGE E. MCGILL Abstract Valley anticlines of two types exist in the Needles District of Canyonlands National Park: (1) large, upright anticlines following major drainages, and (2) small, generally asymmetrical anticlines confined to rocks along the floors of smaller...
Stratigraphy of the lower Cedar Mesa Sandstone in the <b>Needles</b> <b>District</b> of C...
Published: 01 June 2008
Figure 3 Stratigraphy of the lower Cedar Mesa Sandstone in the Needles District of Canyonlands National Park. The unit studied in this paper is the main white sandstone between surfaces 3 and 4 and is 20–25 m thick throughout the area (Elephant Canyon). FS indicates a flood surface, a bypass
Journal Article
Journal: GSA Bulletin
Published: 01 June 1999
GSA Bulletin (1999) 111 (6): 808-822.
...Jason M. Moore; Richard A. Schultz Abstract Detailed studies of 11 segmented normal faults from five grabens in the Needles District of Canyonlands National Park, Utah, demonstrate key processes in the growth, linkage, and evolution of grabens. Field observations and stereophotogrammetry reveal...
Journal Article
Published: 03 April 2018
Bulletin of the Seismological Society of America (2018) 108 (3B): 1573-1595.
... light detection and ranging (lidar) data. Offshore on the dextral‐reverse Needles fault, multibeam bathymetric and high‐resolution seismic reflection data image a throw of the seabed of up to 3.5 ± 0.2 m . Mean net slip on the total ∼ 83 km rupture was 5.5 ± 1 m , this is an unusually large mean slip...
FIGURES | View All (10)
Journal Article
Published: 01 February 2007
Geochemistry: Exploration, Environment, Analysis (2007) 7 (1): 57-69.
...R. Fältmarsch; P. Peltola; M. Åström; H. Raitio Abstract Moss, humus, till and needle samples from coniferous forests at 87–103 sites were used to elucidate how natural processes and human activities throughout a 500 km 2 area in western Finland have affected the content, accumulation...
FIGURES | View All (10)
Journal Article
Published: 01 October 2009
American Mineralogist (2009) 94 (10): 1312-1324.
... Federation. It occurs as tiny, slender, needle-shaped crystals, up to 400 μm long and 10 μm across, generally forming fibrous aggregates. Tazieffite is closely associated with greenockite, galena, mutnovskite, kudriavite, and Cd-rich cannizzarite. Other minerals spatially associated are pyrite, anhydrite...
FIGURES | View All (5)
Journal Article
Journal: AAPG Bulletin
Published: 01 November 2017
AAPG Bulletin (2017) 101 (11): 1835-1858.
... ). The cores and thin sections show the clear laminar boundaries, and laminae have pure mineral components ( Figure 4A ). The light laminae are composed of recrystallization calcite, which occurs as “needles” or closely packed grain crystals ( Figure 5A ). The dark laminae are composed of clay minerals...
FIGURES | View All (13)
Journal Article
Journal: PALAIOS
Published: 01 July 2014
PALAIOS (2014) 29 (7): 325-337.
... of 30 points across each sample. Charcoal fragments were collected mechanically from the sediments with the aid of preparation needles, scalpels, and tweezers, either directly in the field or from matrix samples in the lab. The fragile nature of the charcoal precludes cleaning of adhering mineral...
FIGURES | View All (6)
Journal Article
Published: 01 December 2012
Mineralogical Magazine (2012) 76 (7): 2803-2817.
... district, San Miguel County, Colorado. The new mineral occurs on fracture surfaces in corvusite- and montroseite-impregnated sandstone and forms as a result of the oxidative alteration of these phases. At the West Sunday mine, calciodelrioite is associated with celestine, gypsum, huemulite, metarossite...
FIGURES | View All (9)
Journal Article
Journal: Economic Geology
Published: 01 September 1938
Economic Geology (1938) 33 (6): 635-646.
...Carl Arthur Lamey Abstract A dip-needle survey of a heavily drift-covered part of the Keweenawan copper district of northern Michigan, in which there are few outcrops, was undertaken in an effort to trace the major Keweenawan units beneath the drift. Small but persistent variations in dip-needle...
Journal Article
Published: 01 July 2017
American Mineralogist (2017) 102 (7): 1451-1461.
... concentration of needle-like rutile or other oxide inclusions. Three metamorphic-type sapphires from Sri Lanka, Madagascar, and Tanzania were studied here using LA-ICP-MS, electronprobe microanalysis (EPMA), and nanoSIMS to document correlations between the various trace elements and their distribution between...
FIGURES | View All (6)
Journal Article
Published: 01 February 2012
The Canadian Mineralogist (2012) 50 (1): 45-53.
... as very thin, needle-like prisms with pyramidal terminations; crystals commonly occur in parallel bundles and grow in divergent and “jackstraw” masses. Individual crystals are up to 1 mm long and 50 μm in diameter, and are golden-yellow with a yellow streak. The mineral is transparent...
FIGURES | View All (4)
Journal Article
Published: 01 July 1955
Geological Magazine (1955) 92 (4): 310-320.
... being expelled in the process. A later influx of new K from the granite led to the growth of muscovite metacrysts. This was associated with destruction of part of the early sillimanite, recrystallization of part, growth of a new crop of sillimanite needles, and formation of muscovite-sillimanite...
Journal Article
Published: 01 December 1938
American Mineralogist (1938) 23 (12): 876-880.
...Waldemar T. Schaller Abstract An unusual occurrence of thaumasite, CaSiO 3 · CaSO 4 · CaCO 3 · 15H 2 O, was found by Mr. V. L. Kegler 1 in the Isabella mine, Isabella, Ducktown district, Tenn. The mineral was first noted as small tuffs of radiating crystals on the iron sulphides and was identified...
Journal Article
Published: 02 August 2017
Geological Magazine (2017) 155 (1): 187-192.
.... The main specimen was prepared mechanically with a steel needle and final preparation was performed with diluted ( c . 10%) acetic acid. Mawsoniids from Upper Triassic and Lower Jurassic strata are known exclusively from freshwater environments in North America ( Chinlea and Diplurus...
Journal Article
Published: 01 January 2018
American Mineralogist (2018) 103 (1): 26-38.
... that the suture is a persistently mineralized domain. The study area of Seruwila is located in the Trincomalee District about 275 km from Colombo ( Fig. 1 ). The dominant basement rocks in this area are charnockites (orthopyroxene-bearing anhydrous granulites) and quartzite (HC) and metagranites...
FIGURES | View All (10)
Journal Article
Published: 01 April 2019
Mineralogical Magazine (2019) 83 (2): 153-160.
..., with a Mohs hardness of ~2, irregular fracture and one perfect cleavage on {010}. The calculated density is 3.324 g cm –3 . Crystals are thin needles or blades, flattened on {010} and elongate on [100], exhibiting the forms {010}, {001}, {101} and {10 $\bar{1}$ }, and are up to ~0.1 mm in length. Feynmanite...
FIGURES | View All (6)
Journal Article
Published: 01 April 2006
The Canadian Mineralogist (2006) 44 (2): 523-531.
... the Abundancia mine, El Guanaco mining district, Chile. It is dimorphous with lavendulan and represents the Ca-analogue of zdenekite. It occurs as rosette-shaped aggregates (up to 5 mm) of thin lamellar, subparallel, strongly bent intergrowths (0.3 mm × 10 μm) or needle-shaped aggregates of 0.8 mm length and 10...
FIGURES | View All (7)
Journal Article
Published: 01 December 2018
Mineralogical Magazine (2018) 82 (6): 1261-1275.
...Travis A. Olds; Jakub Plášil; Anthony R. Kampf; Peter C. Burns; Barbara P. Nash; Joe Marty; Timothy P. Rose; Shawn M. Carlson ABSTRACT Redcanyonite (IMA2016-082), (NH 4 ) 2 Mn[(UO 2 ) 4 O 4 (SO 4 ) 2 ](H 2 O) 4 , occurs underground in the Blue Lizard mine, Red Canyon, White Canyon district, San...
FIGURES | View All (8)
Journal Article
Published: 01 June 2016
European Journal of Mineralogy (2016) 28 (3): 649-654.
... Lithium Company mine, Kings Mountain district, Cleveland County, North Carolina, USA. Kayrobertsonite crystals occur as intergrown masses of snow-white, soft, finely fibrous needles, less than 5 μm in diameter and no more than 100 μm in length. Quantitative analysis of Foote mine kayrobertsonite gave...