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Museum of Anthropology Granite Point (45WT41)

Area A (Leonhardy 1970, Table 6)

StratumSedimentAssociation
1APost-Ash Aeolian Sands

Minimal terminal date: 955 +/- 155 B.P. [WSU-666]
Assemblage A1
1BPost-Ash Aeolian Sands
2Paludal deposition: Pond or slough bottom Partial dog skeleton
3APost-Ash Aeolian SandsAssemblage A3a
3BColluvial deposition: Possibly mud flow from canyon wall
3CLater Floodplain

Approximate date: 2,440 +/- 170 B.P. [WSU-667]
Assemblage A3c
4Paludal deposition: Possible pond or slough bottom
5Later Floodplain: At least five alluvial bedsAssemblage A5-6
6Later Floodplain

Minimal initial date: 5,145 +/- 200 B.P. [WSU-668]
Assemblage 6 [as part of Assemblage 5-6]
UNCONFORMITY
7Early FloodplainIndication 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 DescriptionAssociation
1APost-Ash Aeolian SandsAssemblage B1A
1BPost-Ash Aeolian Sands
1CPost-Ash Aeolian SandsAssemblage B1C
2Post-Ash Aeolian Sands

*Maximum initial date: 3,075 +/- 160 B.P. [WSU-665]
Assemblage B2
3Later Floodplain: Indistinct alluvial beds

Minimum terminal date: 3,075 +/- 160 B.P. [WSU-665]
Assemblage B3
UNCONFORMITY
4Early Floodplain: Alluvial beds, diffuse iron oxide stainAssemblage B4

 

Example of Stratigraphy, Area B (Leonhardy 1970, Fig. 11)
Example of Stratigraphy, Area B (Leonhardy 1970, Fig. 11)

Area C (Leonhardy 1970, Table 8)

StratumDescriptionAssociation
18-15Colluvial deposition: slump and slopewash deposits
UNCONFORMITY
14Post-Ash Aeolian Sands
13Post-Ash Aeolian Sands
12Post-Ash Aeolian SandsAssemblage C1b
UNCONFORMITY
11CPale Loess (Sandy facies)
11BVolcanic Ash: Aeolian sand and volcanic ash mixtureAssemblage C2
11AVolcanic Ash: Layer of pure volcanic ash
10BPre-Ash Aeolian SandsAssemblage C3
10AFan Deposit
9Early Floodplain: flood plain silt
8Pre-Ash Aeolian SandsAssemblage C3b, Assemblage C3
7-3Early Floodplain: Sterile floodplain deposits
2Fan Deposit
1Cobble Gravel: Culture-bearing cobble gravelAssemblage C4

 

Stratigraphy of the Control Block, Area C, 1968 Excavation (Leonhardy 1970, Fig. 18)
Stratigraphy of the Control Block, Area C, 1968 Excavation (Leonhardy 1970, Fig. 18)

Stratigraphic Section 1 (Leonhardy 1970, Table 9)

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

Stratigraphic Section 2 (Leonhardy 1970, Table 10)

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

 

Stratigraphic Section 3 (Leonhardy 1970, Table 11)

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

Stratigraphic Section 7 (Leonhardy 1970, Table 12)

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

 

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