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The National Roman Fabric Reference Collection: a Handbook

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Appendix 1: Keywords and Definitions
Appendix 2: Physical Layout of Sherds Housed in the NRFRC


Appendix 1: Keywords and Definitions

The following lists vocabulary used in the text that requires explanation.

Buff Very pale brown
Cream Very pale yellow
Hard Scratched with penknife
Soft Scratched with fingernail
Very hard Not scratched with penknife
Surface Feel
Harsh Feels abrasive to the touch
Powdery Powdery
Rough Irregularities can be felt
Smooth No irregularities can be felt
Soapy Soapy
Fresh Fracture
Conchoidal Breaks as flint/glass
Finely Irregular Small, closely-spaced irregularities
Hackly More widely-spaced irregularities
Laminated Stepped effect
Smooth Flat or slightly curved, no visible irregularities
Accessory minerals Black, glassy, frequently angular
Argillaceous rocks Clay pellets and clay-rich inclusions
Clay pellets Always naturally occurring
Frequency has been defined after Fitzpatrick 1984, and is illustrated on Figure 2.
Sparse 0-4% inclusions
Common 5-19%
Abundant 20.00%
Rounding parameters follow those defined by Pettijohn et al 1972 and illustrated on Fig 3, although simplified into three groupings:

FitzPatrick, E A, 1984 Micromorphology of soils

Pettijohn, F J, Potter, P E & Siever, R, 1972 Sand and sandstone, New York