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 Athabasca Basin uranium mines produce from deposits that occur at an erosional unconformity marking the contact of sediments with underlying basement crystalline rocks.
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.