erosional unconformity

erosional unconformity

[ə′rō·zhən·əl ‚ən·kən′fȯr·məd·ē]
(geology)
The surface that separates older, eroded rocks from younger, overlying sediments.
References in periodicals archive ?
The Permian-Triassic boundary located near Haftad Gholleh is an erosional unconformity or disconformity, as in other parts of Iran, where Permian sequences contain dolomitic limestone, shale and sandstone situated below the Triassic sequence at a disconformity.
The 1835 deposits were unfruitful for correlations, as this eruption buried all previous sequences over an erosional unconformity and therefore offer the only information that all other deposits are older.
This boundary of erosional unconformity contains dolomitic limestone and shale and sandstone disconformably located below the Triassic sequence and represents a hiatus of about 10 million years.