Area A (Leonhardy 1970, Table 6)

Stratum	Sediment	Association
1A	Post-Ash Aeolian Sands Minimal terminal date: 955 +/- 155 B.P. [WSU-666]	Assemblage A1
1B	Post-Ash Aeolian Sands
2	Paludal deposition: Pond or slough bottom	Partial dog skeleton
3A	Post-Ash Aeolian Sands	Assemblage A3a
3B	Colluvial deposition: Possibly mud flow from canyon wall
3C	Later Floodplain Approximate date: 2,440 +/- 170 B.P. [WSU-667]	Assemblage A3c
4	Paludal deposition: Possible pond or slough bottom
5	Later Floodplain: At least five alluvial beds	Assemblage A5-6
6	Later Floodplain Minimal initial date: 5,145 +/- 200 B.P. [WSU-668]	Assemblage 6 [as part of Assemblage 5-6]
	UNCONFORMITY
7	Early Floodplain	Indication of human occupation, no artifacts

Stratigraphy of West and North Walls, Area A (Leonhardy 1970, Fig. 5 & 6)

Area B (Leonhardy 1970, Table 7)

Stratum	Description	Association
1A	Post-Ash Aeolian Sands	Assemblage B1A
1B	Post-Ash Aeolian Sands
1C	Post-Ash Aeolian Sands	Assemblage B1C
2	Post-Ash Aeolian Sands *Maximum initial date: 3,075 +/- 160 B.P. [WSU-665]	Assemblage B2
3	Later Floodplain: Indistinct alluvial beds Minimum terminal date: 3,075 +/- 160 B.P. [WSU-665]	Assemblage B3
	UNCONFORMITY
4	Early Floodplain: Alluvial beds, diffuse iron oxide stain	Assemblage B4

 

Area C (Leonhardy 1970, Table 8)

Stratum	Description	Association
18-15	Colluvial deposition: slump and slopewash deposits
	UNCONFORMITY
14	Post-Ash Aeolian Sands
13	Post-Ash Aeolian Sands
12	Post-Ash Aeolian Sands	Assemblage C1b
	UNCONFORMITY
11C	Pale Loess (Sandy facies)
11B	Volcanic Ash: Aeolian sand and volcanic ash mixture	Assemblage C2
11A	Volcanic Ash: Layer of pure volcanic ash
10B	Pre-Ash Aeolian Sands	Assemblage C3
10A	Fan Deposit
9	Early Floodplain: flood plain silt
8	Pre-Ash Aeolian Sands	Assemblage C3b, Assemblage C3
7-3	Early Floodplain: Sterile floodplain deposits
2	Fan Deposit
1	Cobble Gravel: Culture-bearing cobble gravel	Assemblage C4

 

Stratigraphic Section 1 (Leonhardy 1970, Table 9)

Stratum	Description
1	Post-Ash Aeolian Sands
2	Colluvial Deposition
3	Later Floodplains
	UNCONFORMITY
4	Early Floodplains

Stratigraphic Section 2 (Leonhardy 1970, Table 10)

Stratum	Description
1	Post-Ash Aeolian Sands
2	Colluvial Deposition
3	Post-Ash Aeolian Sands
4	Pale Loess
5	Volcanic Ash
6	Colluvial Deposition
7	Pre-Ash Aeolian Sands
	UNCONOFORMITY
8	Early Floodplains

 

Stratigraphic Section 3 (Leonhardy 1970, Table 11)

Stratum	Description
1	Post-Ash Aeolian Sands
2	Pale Loess
	UNCONFORMITY
3	Early Floodplain

Stratigraphic Section 7 (Leonhardy 1970, Table 12)

Stratum	Description
1	Post-Ash Aeolian Sands
2	Pale Loess
3	Volcanic Ash
4	Colluvial Deposition
5	Fan Gravel

 

*For more detailed sediment descriptions please refer to Leonhardy 1970.