Sedimentary Structures in the Keuper Marl (Upper Triassic)
By: Klen, george devries
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Material type: 
ArticleDescription: 137 - 144 pp ; Illustration.Subject(s): Sedimentary structure - keuper marl | Upper triassic - keuper marl
In:
Geological magazine : Vol. 99 Iss. 1-6 Year. 1962Summary: Combinations of sedimentary structures in the lacustrine Keuper Marl are segregated bathymetrically. Beds deposited below lacustrine wave base are characterized by even bedding, rhythmic lamination, disturbed stratification, graded bedding, load casts, “pull-apart” structures, and oscillation ripple marks. Lacustrine beds deposited above wave base contain even bedding, rhythmic lamination, oscillation and interference ripple marks, current lineation, rib-and-furrow structure, groove casts, mudcracks, and raindrop imprints.
A marine unit in the Keuper Marl is characterized by even bedding, flat-topped oscillation ripple marks, and air-heave structures.
Comparison with sedimentary structures of other known lacustrine deposits suggests that the combination of structures in the non-marine Keuper Marl is diagnostic of lacustrine deposits. Recognition of such combinations of sedimentary structures should aid in interpreting the origin of continental sequences.
| Item type | Current location | Collection | Call number | Status | Date due | Barcode |
|---|---|---|---|---|---|---|
Article
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Library and Information Centre Periodical Section | Bound Journal Collection | Not for loan | 002547_21 | ||
Serials/Scientific Journal
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Library and Information Centre Periodical Section | Bound Journal Collection | 550 GEO (Browse shelf) | Available | 002547 |
Combinations of sedimentary structures in the lacustrine Keuper Marl are segregated bathymetrically. Beds deposited below lacustrine wave base are characterized by even bedding, rhythmic lamination, disturbed stratification, graded bedding, load casts, “pull-apart” structures, and oscillation ripple marks. Lacustrine beds deposited above wave base contain even bedding, rhythmic lamination, oscillation and interference ripple marks, current lineation, rib-and-furrow structure, groove casts, mudcracks, and raindrop imprints.
A marine unit in the Keuper Marl is characterized by even bedding, flat-topped oscillation ripple marks, and air-heave structures.
Comparison with sedimentary structures of other known lacustrine deposits suggests that the combination of structures in the non-marine Keuper Marl is diagnostic of lacustrine deposits. Recognition of such combinations of sedimentary structures should aid in interpreting the origin of continental sequences.
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