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  • nodule beds  (2)
  • Communications and Radar  (1)
  • Lunar and Planetary Science and Exploration; Geophysics  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Emplacement of xenolith nodules in the Kaupulehu lava flow, Hualalai Volcano, Hawaii (1995)
    Springer
    Bulletin of volcanology 57 (1995), S. 179-184 
    Details
    ISSN: 1432-0819
    Keywords: lava flows ; xenoliths ; nodule beds ; levee deposits ; Hualalai Volcano, Hawaii
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The basaltic Kaupulehu 1800–1801 lava flow of Hualalai Volcano, Hawaii contains abundant ultramafix xenoliths. Many of these xenoliths occur as bedded layers of semi-rounded nodules, each thinly coated with a veneer (typically 1 mm thick) of lava. The nodule beds are analogous to cobble deposits of fluvial sedimentary systems. Although several mechanisms have been proposed for the formation of the nodule beds, it was found that, at more than one locality, the nodule beds are overbank levee deposits. The geological occurrence of the nodules, certain diagnostic aspects of the flow morphology and consideration of the inferred emplacement process indicate that the Kaupulehu flow had an exceptionally low viscosity on eruption and that the flow of the lava stream was extremely rapid, with flow velocities of at least 10 m s-1 (more than 40 km h-1). This flow is the youngest on Hualalai Volcano and future eruptions of a similar type would pose considerable hazard to life as well as property.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00265037
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Emplacement of xenolith nodules in the Kaupulehu lava flow, Hualalai Volcano, Hawaii (1995)
    Springer
    Bulletin of volcanology 57 (1995), S. 179-184 
    Details
    ISSN: 1432-0819
    Keywords: Key words lava flows ; xenoliths ; nodule beds ; levee deposits ; Hualalai Volcano ; Hawaii
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  The basaltic Kaupulehu 1800–1801 lava flow of Hualalai Volcano, Hawaii contains abundant ultramafic xenoliths. Many of these xenoliths occur as bedded layers of semi-rounded nodules, each thinly coated with a veneer (typically 1 mm thick) of lava. The nodule beds are analogous to cobble deposits of fluvial sedimentary systems. Although several mechanisms have been proposed for the formation of the nodule beds, it was found that, at more than one locality, the nodule beds are overbank levee deposits. The geological occurrence of the nodules, certain diagnostic aspects of the flow morphology and consideration of the inferred emplacement process indicate that the Kaupulehu flow had an exceptionally low viscosity on eruption and that the flow of the lava stream was extremely rapid, with flow velocities of at least 10 m s–1 (more than 40 km h–1). This flow is the youngest on Hualalai Volcano and future eruptions of a similar type would pose considerable hazard to life as well as property.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00265037
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    Paper (German National Licenses)
    Fulltext
  • 3
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    Unknown
    The Clementine Bistatic Radar Experiment (1996)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: During the Clementine 1 mission, a bistatic radar experiment measured the magnitude and polarization of the radar echo versus bistatic angle, beta, for selected lunar areas. Observations of the lunar south pole yield a same-sense polarization enhancement around beta = 0. Analysis shows that the observed enhancement is localized to the permanently shadowed regions of the lunar south pole. Radar observations of periodically solar-illuminated lunar surfaces, including the north pole, yielded no such enhancement. A probable explanation for these differences is the presence of low-loss volume scatterers, such as water ice, in the permanently shadowed region at the south pole.
    Keywords: Communications and Radar
    Type: NASA-CR-204693 , NAS 1.26:204693 , Science; 274; 1495-1498
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    The Miniature Radio Frequency Instruments (Mini-RF) Global Observations of Earth's Moon (2014)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Radar provides a unique means to analyze the surface and subsurface physical properties of geologic deposits, including their wavelength-scale roughness, the relative depth of the deposits, and some limited compositional information. The NASA Lunar Reconnaissance Orbiter's (LRO) Miniature Radio Frequency (Mini-RF) instrument has enabled these analyses on the Moon at a global scale. Mini-RF has accumulated 67% coverage of the lunar surface in S-band (12.6 cm) radar with a resolution of 30 m/pixel. Here we present new Mini-RF global orthorectified uncontrolled S-band maps of the Moon and use them for analysis of lunar surface physical properties. Reported here are readily apparent global- and regional-scale differences in lunar surface physical properties that suggest three distinct terranes, namely: a (1) Nearside Radar Dark Region; (2) Orientale basin and continuous ejecta; and the (3) Highlands Radar Bright Region. Integrating these observations with new data from LRO's Diviner Radiometer rock abundance maps, as well Clementine and Lunar Prospector derived compositional values show multiple distinct lunar surface terranes and sub-terranes based upon both physical and compositional surface properties. Previous geochemical investigations of the Moon suggested its crust is best divided into three to four basic crustal provinces or terranes (Feldspathic Highlands Terrane (-An and -Outer), Procellarum KREEP Terrane, and South Pole Aitken Terrane) that are distinct from one another. However, integration of these geochemical data sets with new geophysical data sets allows us to refine these terranes. The result shows a more complex view of these same crustal provinces and provides valuable scientific and hazard perspectives for future targeted human and robotic exploration.
    Keywords: Lunar and Planetary Science and Exploration; Geophysics
    Type: GSFC-E-DAA-TN21227 , Icarus; 243; 173-190
    Format: text
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    NASA TECHNICAL REPORTS
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