Museum Of Anthropology

Granite Point (45WT41)

Stratigraphic Units*

 

Area A (Leonhardy 1970, Table 6)

Stratum Sediment Association
1a Post-Ash Aeolian Sands Assemblage A1
Minimal terminal date: 955 +/- 155 B.P. [WSU-666]
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 Assemblage A3c
Approximate date: 2,440 +/- 170 B.P. [WSU-667]
4 Paludal deposition: Possible pond or slough bottom  
5 Later Floodplain: At least five alluvial beds Assemblage A5-6
6 Later Floodplain Assemblage 6 [as part of Assemblage 5-6]
Minimal initial date: 5,145 +/- 200 B.P. [WSU-668]
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 Assemblage B2
*Maximum initial date: 3,075 +/- 160 B.P. [WSU-665]
3 Later Floodplain: Indistinct alluvial beds Assemblage B3
Minimum terminal date: 3,075 +/- 160 B.P. [WSU-665]
UNCONFORMITY
4 Early Floodplain: Alluvial beds, diffuse iron oxide stain Assemblage B4

 

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

 

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

 

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

 

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.

 

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