Rosalind Tuthill Helz, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 47
Compositions of glasses from the Pu'u O'o-Kupaianaha eruption of Kilauea Volcano, Hawaii January 1983 through December 1994 Compositions of glasses from the Pu'u O'o-Kupaianaha eruption of Kilauea Volcano, Hawaii January 1983 through December 1994
No abstract available.
Authors
Rosalind Tuthill Helz, B.C. Hearn
USGS Wildland Fire Workshop, EROS Data Center, Sioux Falls, SD, July 9-10, 1997 USGS Wildland Fire Workshop, EROS Data Center, Sioux Falls, SD, July 9-10, 1997
Report on the first workshop on USGS wildland fire expertise and capabilities. The workshop brought together operational and research representatives ofthe Federal fire management agencies to initiate a more comprehensive assessment ofthe USGS's capabilities and the appropriate role(s) for USGS interaction and involvement with the fire community. The report discusses how the USGS can...
Authors
S. G. Coloff, J. Findley, Rosalind L. Helz
Differentiation and magma mixing on Kilauea's east rift zone: A further look at the eruptions of 1955 and 1960. Part II. The 1960 lavas Differentiation and magma mixing on Kilauea's east rift zone: A further look at the eruptions of 1955 and 1960. Part II. The 1960 lavas
New and detailed petrographic observations, mineral compositional data, and whole-rock vs glass compositional trends document magma mixing in lavas erupted from Kilauea's lower east rift zone in 1960. Evidence includes the occurrence of heterogeneous phenocryst assemblages, including resorbed and reversely zoned minerals in the lavas inferred to be hybrids. Calculations suggest that this...
Authors
T. L. Wright, Rosalind Tuthill Helz
The Pu'u O'o-Kupaianaha eruption of Kilauea Volcano; June 1990 through August 1994 lava sample archive The Pu'u O'o-Kupaianaha eruption of Kilauea Volcano; June 1990 through August 1994 lava sample archive
No abstract available.
Authors
Margaret T. Mangan, C. C. Heliker, T. N. Mattox, J. P. Kauahikaua, Rosalind Tuthill Helz, B. C. Hearn
The Stillwater Complex, Montana: a subvolcanic magma chamber? The Stillwater Complex, Montana: a subvolcanic magma chamber?
Five magma types occur as sills in the footwall of the Stillwater Complex, all of them coeval with the Stillwater Complex, all of them coeval with the Stillwater in age. Two of the magma types have compositions that suggest they are similar to the magmas from which the cumulates of the Stillwater's Basal and Ultramafic series crystallized. Melting experiments show that the...
Authors
Rosalind Tuthill Helz
Episode 49 of the Pu'u 'Ō'ō-Kūpaianaha eruption of Kilauea volcano-breakdown of a steady-state eruptive era Episode 49 of the Pu'u 'Ō'ō-Kūpaianaha eruption of Kilauea volcano-breakdown of a steady-state eruptive era
The Pu'u 'O'o-Kupaianaha eruption (1983-present) is the longest lived rift eruption of either Kilauea or neighboring Mauna Loa in recorded history. The initial fissure opening in January 1983 was followed by three years of episodic fire fountaining at the Pu'u 'O'o vent on Kilauea's east rift zone ∼19km from the summit (episodes 4–47). These spectacular events gave way in July 1986 to...
Authors
M. T. Mangan, C. C. Heliker, T. N. Mattox, J. P. Kauahikaua, Rosalind Tuthill Helz
Science and Products
Filter Total Items: 47
Compositions of glasses from the Pu'u O'o-Kupaianaha eruption of Kilauea Volcano, Hawaii January 1983 through December 1994 Compositions of glasses from the Pu'u O'o-Kupaianaha eruption of Kilauea Volcano, Hawaii January 1983 through December 1994
No abstract available.
Authors
Rosalind Tuthill Helz, B.C. Hearn
USGS Wildland Fire Workshop, EROS Data Center, Sioux Falls, SD, July 9-10, 1997 USGS Wildland Fire Workshop, EROS Data Center, Sioux Falls, SD, July 9-10, 1997
Report on the first workshop on USGS wildland fire expertise and capabilities. The workshop brought together operational and research representatives ofthe Federal fire management agencies to initiate a more comprehensive assessment ofthe USGS's capabilities and the appropriate role(s) for USGS interaction and involvement with the fire community. The report discusses how the USGS can...
Authors
S. G. Coloff, J. Findley, Rosalind L. Helz
Differentiation and magma mixing on Kilauea's east rift zone: A further look at the eruptions of 1955 and 1960. Part II. The 1960 lavas Differentiation and magma mixing on Kilauea's east rift zone: A further look at the eruptions of 1955 and 1960. Part II. The 1960 lavas
New and detailed petrographic observations, mineral compositional data, and whole-rock vs glass compositional trends document magma mixing in lavas erupted from Kilauea's lower east rift zone in 1960. Evidence includes the occurrence of heterogeneous phenocryst assemblages, including resorbed and reversely zoned minerals in the lavas inferred to be hybrids. Calculations suggest that this...
Authors
T. L. Wright, Rosalind Tuthill Helz
The Pu'u O'o-Kupaianaha eruption of Kilauea Volcano; June 1990 through August 1994 lava sample archive The Pu'u O'o-Kupaianaha eruption of Kilauea Volcano; June 1990 through August 1994 lava sample archive
No abstract available.
Authors
Margaret T. Mangan, C. C. Heliker, T. N. Mattox, J. P. Kauahikaua, Rosalind Tuthill Helz, B. C. Hearn
The Stillwater Complex, Montana: a subvolcanic magma chamber? The Stillwater Complex, Montana: a subvolcanic magma chamber?
Five magma types occur as sills in the footwall of the Stillwater Complex, all of them coeval with the Stillwater Complex, all of them coeval with the Stillwater in age. Two of the magma types have compositions that suggest they are similar to the magmas from which the cumulates of the Stillwater's Basal and Ultramafic series crystallized. Melting experiments show that the...
Authors
Rosalind Tuthill Helz
Episode 49 of the Pu'u 'Ō'ō-Kūpaianaha eruption of Kilauea volcano-breakdown of a steady-state eruptive era Episode 49 of the Pu'u 'Ō'ō-Kūpaianaha eruption of Kilauea volcano-breakdown of a steady-state eruptive era
The Pu'u 'O'o-Kupaianaha eruption (1983-present) is the longest lived rift eruption of either Kilauea or neighboring Mauna Loa in recorded history. The initial fissure opening in January 1983 was followed by three years of episodic fire fountaining at the Pu'u 'O'o vent on Kilauea's east rift zone ∼19km from the summit (episodes 4–47). These spectacular events gave way in July 1986 to...
Authors
M. T. Mangan, C. C. Heliker, T. N. Mattox, J. P. Kauahikaua, Rosalind Tuthill Helz