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HARTMAN MULTIMEDIA
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More Mesa Asphalt Deposits Frozen cascades of asphalt and tar dikes are conspicuous
along the More Mesa sea cliff. These
deposits are resistant to weathering and wave action and have formed a small
foreland along an otherwise straight shoreline.
Deposition of new asphalt has ceased in recent years since the depletion
of the adjacent La Goleta gas field. Other seeps, such as the Carpinteria Asphalt Deposits, have greater biological significance; however, this seep is
similar to those that occur elsewhere, including some oh the channel islands and
the naturally occurring submarine seeps that frequently result in tar on the
sandy beaches. Integrity: There
are homes atop the cliffs; however, the resistant asphalt is slowing the
sea-cliff recession and subsequent slumping. Use: Private,
though they can be viewed from the beach. Ref: Weaver, D. W. 1969. Geology of the Northern Channel Islands. Amer. Assoc. of Petro. Geol. Spec. Publ. April 1976
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