Richard B Waitt, PhD
Research Geologist at the Cascades Volcano Observatory.
Science and Products
Filter Total Items: 52
Case for periodic, colossal jokulhlaups from Pleistocene glacial Lake Missoula Case for periodic, colossal jokulhlaups from Pleistocene glacial Lake Missoula
Two classes of field evidence firmly establish that late Wisconsin glacial Lake Missoula drained periodically as scores of colossal jökulhlaups (glacier-outburst floods). (1) More than 40 successive, flood-laid, sand-to-silt graded rhythmites accumulated in back-flooded valleys in southern Washington. Hiatuses are indicated between flood-laid rhythmites by loess and volcanic ash beds
Authors
R. B. Waitt
Periodic jökulhlaups from Pleistocene glacial Lake Missoula-New evidence from varved sediment in northern Idaho and Washington Periodic jökulhlaups from Pleistocene glacial Lake Missoula-New evidence from varved sediment in northern Idaho and Washington
Newly examined exposures in northern Idaho and Washington show that catastrophic floods from glacial Lake Missoula during late Wisconsin time were repeated, brief jökulhlaups separated by decades of quiet glaciolacustrine and subaerial conditions. Glacial Priest Lake, dammed in the Priest River valley by a tongue of the Purcell trench lobe of the Cordilleran ice sheet, generally...
Authors
Richard B. Waitt
Deposits and effects of devastating lithic pryoclastic density current from Mount St. Helens on 18 May 1980; field guide for northeast radial Deposits and effects of devastating lithic pryoclastic density current from Mount St. Helens on 18 May 1980; field guide for northeast radial
No abstract available.
Authors
R. B. Waitt
Preliminary geologic map of the Snoqualmie Pass 1:100,000 Quadrangle, Washington Preliminary geologic map of the Snoqualmie Pass 1:100,000 Quadrangle, Washington
No abstract available.
Authors
V. A. Frizzell, R. W. Tabor, D. B. Booth, K.M. Ort, R. B. Waitt
Eruption-triggered avalanche, flood, and lahar at Mount St. Helens - Effects of winter snowpack Eruption-triggered avalanche, flood, and lahar at Mount St. Helens - Effects of winter snowpack
An explosive eruption of Mount St. Helens on 19 March 1982 had substantial impact beyond the vent because hot eruption products interacted with a thick snowpack. A blast of hot pumice, dome rocks, and gas dislodged crater-wall snow that avalanched through the crater and down the north flank. Snow in the crater swiftly melted to form a transient lake, from which a destructive flood and...
Authors
R. B. Waitt, T.C. Pierson, N. S. MacLeod, R. J. Janda, B. Voight, R. T. Holcomb
Tens of successive, colossal Missoula floods at north and east margins of channeled scabland Tens of successive, colossal Missoula floods at north and east margins of channeled scabland
In deposits of Pleistocene glacial lakes in northern Idaho and Washington, beds comprising 20 to 55 varves (average = 35-40) separate each successive graded gravel or sand bed that was swiftly emplaced by a catastrophic flood from glacial Lake Missoula. The floodlaid beds are similar to rhythmic successions of 40 or more graded beds in backflooded tributaries of the lower Columbia River...
Authors
Richard B. Waitt
Preliminary geologic map of the Skykomish River 1:100,000 quadrangle, Washington Preliminary geologic map of the Skykomish River 1:100,000 quadrangle, Washington
No abstract available.
Authors
R. W. Tabor, V. A. Frizzell, D. B. Booth, J. T. Whetten, R. B. Waitt, R. E. Zartman
Regional significance of an early Holocene moraine in Enchantment Lakes basin, North Cascade Range, Washington Regional significance of an early Holocene moraine in Enchantment Lakes basin, North Cascade Range, Washington
The upper Enchantment Lakes basin in the North Cascade Range of Washington displays two moraine belts, each recording an episode of glacier advance after the end of the last glaciation. The inner belt, the Brynhild, 0.1 to 0.5 km beyond existing glaciers, postdates Mount St. Helens Wn tephra (∼450 yr old), which lies only beyond the moraines. The morainal surface is only slightly...
Authors
R. B. Waitt, J. C. Yount, P.T. Davis
Radial outflow and unsteady retreat of late Wisconsin to early Holocene icecap in the northern Long Range upland, Newfoundland Radial outflow and unsteady retreat of late Wisconsin to early Holocene icecap in the northern Long Range upland, Newfoundland
A swampy very low-relief drift terrain along the medial zone of the northern Long Range Mountains passes outward into fresh glacially eroded bed rock of low to moderate relief. Striations, crescentic gouges, lunate fractures, streamlined stoss-and-ice surfaces, erratics, and other evidence in the upland abundantly reveal radial outflow from a late-glacial icecap that was centered over...
Authors
R. B. Waitt
Concepts of classification and nomenclature for surficial deposits Concepts of classification and nomenclature for surficial deposits
No abstract available.
Authors
Richard B. Waitt
Preliminary geologic map of the Chelan 1:100,000 quadrangle, Washington Preliminary geologic map of the Chelan 1:100,000 quadrangle, Washington
No abstract available.
Authors
R. W. Tabor, V. A. Frizzell, J. T. Whetten, D. A. Swanson, G. R. Byerly, D. B. Booth, M. J. Hetherington, R. B. Waitt
About forty last-glacial Lake Missoula jokulhlaups through southern Washington About forty last-glacial Lake Missoula jokulhlaups through southern Washington
The rhythmic Touchet Beds in the Walla Walla and lower Yakima valleys resulted from many separate backfloodings by hydraulically ponded glacial Lake Missoula water. At least once this episodic lake briefly contained half the of water that catastrophically drained the largest glacial Lakes Missoula. Evidence that the Touchet Beds rhythmites originated from brief backfloodings includes up...
Authors
R. B. Waitt
Science and Products
Filter Total Items: 52
Case for periodic, colossal jokulhlaups from Pleistocene glacial Lake Missoula Case for periodic, colossal jokulhlaups from Pleistocene glacial Lake Missoula
Two classes of field evidence firmly establish that late Wisconsin glacial Lake Missoula drained periodically as scores of colossal jökulhlaups (glacier-outburst floods). (1) More than 40 successive, flood-laid, sand-to-silt graded rhythmites accumulated in back-flooded valleys in southern Washington. Hiatuses are indicated between flood-laid rhythmites by loess and volcanic ash beds
Authors
R. B. Waitt
Periodic jökulhlaups from Pleistocene glacial Lake Missoula-New evidence from varved sediment in northern Idaho and Washington Periodic jökulhlaups from Pleistocene glacial Lake Missoula-New evidence from varved sediment in northern Idaho and Washington
Newly examined exposures in northern Idaho and Washington show that catastrophic floods from glacial Lake Missoula during late Wisconsin time were repeated, brief jökulhlaups separated by decades of quiet glaciolacustrine and subaerial conditions. Glacial Priest Lake, dammed in the Priest River valley by a tongue of the Purcell trench lobe of the Cordilleran ice sheet, generally...
Authors
Richard B. Waitt
Deposits and effects of devastating lithic pryoclastic density current from Mount St. Helens on 18 May 1980; field guide for northeast radial Deposits and effects of devastating lithic pryoclastic density current from Mount St. Helens on 18 May 1980; field guide for northeast radial
No abstract available.
Authors
R. B. Waitt
Preliminary geologic map of the Snoqualmie Pass 1:100,000 Quadrangle, Washington Preliminary geologic map of the Snoqualmie Pass 1:100,000 Quadrangle, Washington
No abstract available.
Authors
V. A. Frizzell, R. W. Tabor, D. B. Booth, K.M. Ort, R. B. Waitt
Eruption-triggered avalanche, flood, and lahar at Mount St. Helens - Effects of winter snowpack Eruption-triggered avalanche, flood, and lahar at Mount St. Helens - Effects of winter snowpack
An explosive eruption of Mount St. Helens on 19 March 1982 had substantial impact beyond the vent because hot eruption products interacted with a thick snowpack. A blast of hot pumice, dome rocks, and gas dislodged crater-wall snow that avalanched through the crater and down the north flank. Snow in the crater swiftly melted to form a transient lake, from which a destructive flood and...
Authors
R. B. Waitt, T.C. Pierson, N. S. MacLeod, R. J. Janda, B. Voight, R. T. Holcomb
Tens of successive, colossal Missoula floods at north and east margins of channeled scabland Tens of successive, colossal Missoula floods at north and east margins of channeled scabland
In deposits of Pleistocene glacial lakes in northern Idaho and Washington, beds comprising 20 to 55 varves (average = 35-40) separate each successive graded gravel or sand bed that was swiftly emplaced by a catastrophic flood from glacial Lake Missoula. The floodlaid beds are similar to rhythmic successions of 40 or more graded beds in backflooded tributaries of the lower Columbia River...
Authors
Richard B. Waitt
Preliminary geologic map of the Skykomish River 1:100,000 quadrangle, Washington Preliminary geologic map of the Skykomish River 1:100,000 quadrangle, Washington
No abstract available.
Authors
R. W. Tabor, V. A. Frizzell, D. B. Booth, J. T. Whetten, R. B. Waitt, R. E. Zartman
Regional significance of an early Holocene moraine in Enchantment Lakes basin, North Cascade Range, Washington Regional significance of an early Holocene moraine in Enchantment Lakes basin, North Cascade Range, Washington
The upper Enchantment Lakes basin in the North Cascade Range of Washington displays two moraine belts, each recording an episode of glacier advance after the end of the last glaciation. The inner belt, the Brynhild, 0.1 to 0.5 km beyond existing glaciers, postdates Mount St. Helens Wn tephra (∼450 yr old), which lies only beyond the moraines. The morainal surface is only slightly...
Authors
R. B. Waitt, J. C. Yount, P.T. Davis
Radial outflow and unsteady retreat of late Wisconsin to early Holocene icecap in the northern Long Range upland, Newfoundland Radial outflow and unsteady retreat of late Wisconsin to early Holocene icecap in the northern Long Range upland, Newfoundland
A swampy very low-relief drift terrain along the medial zone of the northern Long Range Mountains passes outward into fresh glacially eroded bed rock of low to moderate relief. Striations, crescentic gouges, lunate fractures, streamlined stoss-and-ice surfaces, erratics, and other evidence in the upland abundantly reveal radial outflow from a late-glacial icecap that was centered over...
Authors
R. B. Waitt
Concepts of classification and nomenclature for surficial deposits Concepts of classification and nomenclature for surficial deposits
No abstract available.
Authors
Richard B. Waitt
Preliminary geologic map of the Chelan 1:100,000 quadrangle, Washington Preliminary geologic map of the Chelan 1:100,000 quadrangle, Washington
No abstract available.
Authors
R. W. Tabor, V. A. Frizzell, J. T. Whetten, D. A. Swanson, G. R. Byerly, D. B. Booth, M. J. Hetherington, R. B. Waitt
About forty last-glacial Lake Missoula jokulhlaups through southern Washington About forty last-glacial Lake Missoula jokulhlaups through southern Washington
The rhythmic Touchet Beds in the Walla Walla and lower Yakima valleys resulted from many separate backfloodings by hydraulically ponded glacial Lake Missoula water. At least once this episodic lake briefly contained half the of water that catastrophically drained the largest glacial Lakes Missoula. Evidence that the Touchet Beds rhythmites originated from brief backfloodings includes up...
Authors
R. B. Waitt