Sedimentary Facies of Scabland Deposits
Boulder gravels - Pateros
Laminated sands w/ ripups - Latah Ck, Pasco Basin
Touchet Beds - WWV
Gravel-bottomed rhythmites - Hwy 14 gullies,
Reworked colluvium - Pataha area, Hwy 14 gullies
Glacial Lake Columbia rhythmites - Hunters shoreline
Sanpoil style lake-flood stacks - Sanpoil shoreline
Silt diamicts, reworked pebbly silts - Loess
Sand sheets, thin rhythmites - Quincy Basin canal
![](https://static.wixstatic.com/media/13658e_4edbd2c0dd7d462d98cce212610eef95~mv2.jpg/v1/fill/w_147,h_103,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/13658e_4edbd2c0dd7d462d98cce212610eef95~mv2.jpg)
Touchet Beds - Burlingame Canyon near Lowden, WA. Sand-silt 'slackwater' beds with minor gravel at the base of some. O.P. Jenkins photo.
![](https://static.wixstatic.com/media/13658e_f854464e6b644bdbb8238bf018c623e1.jpg/v1/fill/w_144,h_91,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/13658e_f854464e6b644bdbb8238bf018c623e1.jpg)
Touchet Beds - Willow Creek Valley at Cecil, OR.
![](https://static.wixstatic.com/media/13658e_4f9b7fe3539243dc9e4968ccb7ba8631~mv2.jpg/v1/fill/w_147,h_102,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/13658e_4f9b7fe3539243dc9e4968ccb7ba8631~mv2.jpg)
Touchet Beds - Sand-gravel bottoms and silt-sand slackwater tops. Abundant angular clasts in larger size fractions remobilized from local hillslopes (reworked colluvium). Latah Creek at Qualchan Golf Course west of Spokane, WA.
![](https://static.wixstatic.com/media/13658e_44b73b1c82ec4b059821cf331472e9ef~mv2.jpg/v1/fill/w_147,h_110,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/13658e_44b73b1c82ec4b059821cf331472e9ef~mv2.jpg)
Laminated sands variant - Latah Creek at Qualchan Golf Course/High Drive, west Spokane, WA.
![](https://static.wixstatic.com/media/13658e_d8dd426a707d417c88df497baae6d91e~mv2.jpg/v1/fill/w_147,h_83,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/13658e_d8dd426a707d417c88df497baae6d91e~mv2.jpg)
Laminated sands variant - Smith Canyon near Eltopia, WA.
![](https://static.wixstatic.com/media/13658e_a392947924b34f8bb7ab810cbb469d79~mv2.jpg/v1/fill/w_147,h_110,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/13658e_a392947924b34f8bb7ab810cbb469d79~mv2.jpg)
Laminated sands variant - Rock Creek west of Sundale, WA (tributary to Columbia River).
![](https://static.wixstatic.com/media/13658e_294671931cf74119a93611b15e38e388~mv2.jpg/v1/fill/w_144,h_108,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/13658e_294671931cf74119a93611b15e38e388~mv2.jpg)
Reworked colluvium - Columbia Gorge downstream of Wallula Gap at Alder Ridge, WA. Sheeted clastic dikes descend through deposit.
![](https://static.wixstatic.com/media/13658e_3284537aaf3647ec84158d73ab6b673b~mv2.jpg/v1/fill/w_147,h_88,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/13658e_3284537aaf3647ec84158d73ab6b673b~mv2.jpg)
Lake-flood rhythmites variant - Upper Columbia River (Lake Roosevelt) shoreline bluff across from Grand Coulee Dam (Spring Canyon).
![](https://static.wixstatic.com/media/13658e_d23cb57289d8446d839e298cb78d2b43~mv2.jpg/v1/fill/w_147,h_110,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/13658e_d23cb57289d8446d839e298cb78d2b43~mv2.jpg)
Lake-flood rhythmites variant - Flood sands punctuate lakebed deposition along the Sanpoil River. Landslide scarp expsure.
![](https://static.wixstatic.com/media/13658e_6d77b269657d4ba4802882d6bc9ad15e~mv2.jpg/v1/fill/w_147,h_110,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/13658e_6d77b269657d4ba4802882d6bc9ad15e~mv2.jpg)
Lake-flood rhythmites variant - Repeated, energetic subaqueous flows with meter-scale flow-deformed beds. Wilmont Creek, WA.
![](https://static.wixstatic.com/media/13658e_6a48eebb25af4920a9bd5a301da7502b~mv2.jpg/v1/fill/w_147,h_98,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/13658e_6a48eebb25af4920a9bd5a301da7502b~mv2.jpg)
Ancient overland flood gravels variant - Calcrete rip-ups and exotic clasts. Pre-late Wisconsin age deposit at White Bluffs Overlook, WA.
![](https://static.wixstatic.com/media/13658e_a4993f6cf8344cd8961cead0d8f02e0a~mv2.jpg/v1/fill/w_147,h_110,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/13658e_a4993f6cf8344cd8961cead0d8f02e0a~mv2.jpg)
Ancient flood gravel grading upward to silt-pebble diamict (upper portion of flood deposit) - Marengo railcut.
![](https://static.wixstatic.com/media/13658e_e4883042c5234297959dd5c2150bf5ca~mv2_d_1600_1200_s_2.jpg/v1/fill/w_147,h_110,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/13658e_e4883042c5234297959dd5c2150bf5ca~mv2_d_1600_1200_s_2.jpg)
Touchet Bed-like rhythmites with lower portions composed of angular, locally-derived basalt (reworked talus/hillslope colluvium) and upper portions composed of silt-sand. Exposed in gullies of Alder Ridge, WA off Hwy 14.
![](https://static.wixstatic.com/media/13658e_25187623200c496da75e6231f236b3fb~mv2.jpg/v1/fill/w_147,h_110,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/13658e_25187623200c496da75e6231f236b3fb~mv2.jpg)
Lake-flood rhythmites variant - Glacial Lake Columbia. Exposed along Upper Columbia/lake Roosevelt and Sanpoil River Valley.
![](https://static.wixstatic.com/media/13658e_c4f5ddecf8ad4eb39db4b3b481f3ae5a~mv2.jpg/v1/fill/w_147,h_111,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/13658e_c4f5ddecf8ad4eb39db4b3b481f3ae5a~mv2.jpg)
Lake-flood rhythmites variant - Repetitively-deformed lakebeds along the Sanpoil River. Pulses of flood sand load and remobilize the soupy, sticky, clayey lake beds, creating spectacular dike-sill structures (t-shaped mud squirts) and roll-ups. Cross cutting relationships show the deformation is entirely related to forces imparted by floods entering from the Columbia.
![](https://static.wixstatic.com/media/13658e_4dca15a2a46f4db3a1cb6408ac0bbc67~mv2.jpg/v1/fill/w_147,h_98,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/13658e_4dca15a2a46f4db3a1cb6408ac0bbc67~mv2.jpg)
Touchet Beds variant - Rhythmites with laminar sand bases and lighter colored silt caps (late- to inter-flood alluvium). Old Lady Canyon, WA. Was Waitt correct?