Assise

An assise (from the Fr., derived from Latin assidere, "to sit beside"), is a geological term for two or more beds or strata of rock united by the occurrence of the same characteristic species or genera.^[1] In the hierarchy of stratigraphic units, an assise lies between a stage (or sub-stage) and a stratum.^[2]

References

1. Chisholm, Hugh, ed. (1911). "Assise". Encyclopædia Britannica 2 (11 ed.). Cambridge University Press.
2. Miall, Andrew D. (2010). The Geology of Stratigraphic Sequences (2nd edition). Springer. p. 16. ISBN 978-3-642-05026-8.

•  This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Assise". Encyclopædia Britannica (11th ed.). Cambridge University Press.