| Age/Date 1 | Event | Description/ Comments/Remarks |
Source 2 |
|---|---|---|---|
| Late 1960s | Probable geothermal melting of South Tahoma Glacier | See Crandell (1971, p.62) | Scott, et.al., 1995, Table 1 |
| A.D.1963 | Lahar from main avalanche from Little Tahoma Peak | White River; Extent to White River Campground | Scott et.al., 1995, Table 2 |
| A.D.1947 | Debris flow and runout flow of glacial-outburst origin in Kautz Creek | Kautz Creek, Nisqually River; Only locally overbank below confluence with Nisqually | Scott et.al., 1995, Table 3 |
| A.D.1910-1927 (slightly modified from Crandell's [1971] estimate of 1910-1930) | Avalanche on Tahoma Glacier (small derivitive debris flow) | Puyallup River; Extent to below glacier terminus | Scott et.al., 1995, Table 2 |
| Mid-19th century | Tephra from summit cone (layer X) | Scattered pumice lapilli | Scott et.al., 1995, Table 1 |
| Post-set W | Central part of Tahoma Lahar | Tahoma Creek; Nisqually River, Extent probably to Elbe | Scott et.al., 1995, Table 2 |
| A.D.1480 (layer Wn) | Set W (mainly layer Wn) | From Mount St. Helens. Dated by Yamaguchi (1983) | Scott et.al., 1995, Table 1 |
| 530-550 | Electron Mudflow | Puyallup River; Extent to Puget Sound lowland | Scott et.al., 1995, Table 2 |
| 1,050-1,000 | 1,000-year-old lahar | Puyallup River; Extent at least to Mowich River, possibly to Puget Sound lowland | Scott et.al., 1995, Table 2 |
| 1,080 | Pyroclastic surge | Identified locally on east side by R.P. Hoblitt, U.S. Geological Survey | Scott et.al., 1995, Table 1 |
| Post-layer C, pre-set W | Lava flows forming summit cone | Age estimated as from 2,100 to 1,200 absolute years by Crandell (1971, p.14) | Scott et.al., 1995, Table 1 |
| Same as Round Pass Mudflow (main part)? | Unnamed lahar (possibly same as Round pass Mudlfow) | Puyallup River; Extent to Puget Sound lowland | Scott et.al., 1995, Table 2 |
| 2,170-2,710 | Round Pass Mudflow (main part) | Puyallup River; Extent to Puget Sound lowland | Scott et.al., 1995, Table 2 |
| 2,200 | Layer C | Scott et.al., 1995, Table 1 |
|
| 2,350 | Block-and-ash flow in Puyallup River valley | Scott et.al., 1995, Table 1 |
|
| 2,500-3,000 | Set P | From Mount St. Helens | Scott et.al., 1995, Table 1 |
| 2,610-2,790 | Round pass Mudflow (part in Tahoma Creek) | Tahoma Creek, Nisqually River; Extent unrecognized below Tahoma Creek | Scott et.al., 1995, Table 2 |
| 3,400 (layer Yn) | Set Y (mainly layer Yn) | From Mount St. Helens. Most prominent tephra deposit. Only layer common throughout Park. | Scott et.al., 1995, Table 1 |
| >3,400 | Pre-Y lahar at Round Pass | Puyallup River, Tahoma Creek; Extent unknown | Scott et.al., 1995, Table 2 |
| 4,500 | Layer B | Scott et.al., 1995, Table 1 |
|
| 4,500-5,000 | Osceola Mudflow (probably includes Greenwater Lahar) | White River (main fork and West Fork); Extent to Puget Sound lowland | Scott et.al., 1995, Table 2 |
| 4,500-5,000 | Paradise lahar (probably synchronous with Osceola Mudflow) | Paradise River, Nisqually River; Extent at least to National | Scott et.al., 1995, Table 2 |
| date unknown | Greenwater lahar (probably part of Osceola Mudflow) | Main fork White River; Extent to Puget Sound lowland | Scott et.al., 1995, Table 2 |
| 4,700 | Layer H | Scott et.al., 1995, Table 1 |
|
| 5,000 | Layer F (possible blast in part) | See Mullineaux (1974, p.19-20) | Scott et.al., 1995, Table 1 |
| 5,200 | Layer S (possible blast) | See Mullineaux (1974, p.20). Also interpreted as possible blast by David Frank and Harry Glicken, U.S. Geological Survey, written commun., 1987. | Scott et.al., 1995, Table 1 |
| 5,500-6,500 | Layers N,D,L,A | Scott et.al., 1995, Table 1 |
|
| 5,700-6,600 | Bomb-bearing flows in White River valley | See Crandell (1971, p.23) | Scott et.al., 1995, Table 1 |
| 6,800 | Layer O | From Mount Mazama (Crater Lake). Latest data by Bacon (1983) | Scott et.al., 1995, Table 1 |
| >8,750 | Layer R | Scott et.al., 1995, Table 1 |
|
|
1Years before 1950 in radiocarbon years, except as otherwise indicated.
2From: Scott, et.al., 1995, Sedimentology, Behavior, and Hazards of Debris Flows at Mount Rainier, Washington: USGS Professional Paper 1547. Compilation from Table 1 (p.10) and Table 2 (p.12). Table 1: Tephra units and other indications of volcanic activity at Mount Rainier; Most data from Mullineaux (1974, 1896) and Crandell (1971). All events originate at Mount Rainier unless otherwise indictated. Table 2: Mainly cohesive debris flows of sector-collapse or avalanche origin at Mount Rainier. Table 3: Mainly noncohesive debris flows and their runout phases at Mount Rainier. |
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