106

Clay Petrography

Provenience

Four Mile Lagoon, south of San Joaquin, from edge of lagoon, taken at groundwater level

Soil suite

Louisville Plain

Percentage of shrinkage before firing

.033

Percentage of shrinkage after firing

.033

Munsell color before firing

10YR 4/1

Munsell color after firing

10YR 7/1

Aplastic spacing

More than double

Aplastic shape

Subangular

B-Fabric

Streams, speckled

Aplastics in B-Fabric (below 0.05 mm)

Diffusing calcite

Quartz (%)

10

Clay (%)

79

Other aplastics

Mudstone

Other aplastics (%)

3

Additional aplastics

Shell

Additional aplastics (%)

4