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n.1.(Anc. Mus.) Intervening space; interval.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Older researchers considered this formation as essentially made up of two lithologic bodies, recognized by different colors, with a diastem between (Soares, 1972, Fulfaro et al., 1984).
These basal gravels dip as much as 45 degrees to the west and have a sharp contact (presumably representing a diastem) with overlying sands.
Tufa deposits will be studied in details concerning their internal primary features, tufa units and facies, microfabrics, diagenesis and interrupting diastem periods.