diastem A very small break in a conformable succession of strata, indicated only by a bedding plane, and representing a brief interruption in the deposition of sediments, with little or no erosion having occurred. Diastems may be very localized, with deposition having occurred elsewhere. Compare NON-SEQUENCE.

diastem A very small break in a conformable succession of strata, indicated only by a bedding plane, and representing a brief interruption in the deposition of sediments, with little or no erosion having occurred. Diastems may be very localized, with deposition having occurred elsewhere.