Rhizoliths in terrestrial carbonates: classification, recognition, genesis and significance
Tóm tắt
Rhizoliths are defined as organosedimentary structures resulting in the preservation of roots of higher plants, or remains thereof, in mineral matter. They are abundant and characteristic features of Quaternary terrestrial carbonates (calcretes and aeolianites) from coastal regions of the western Mediterranean. Field and petrographic observations indicate that five basic types of rhizoliths can be recognized: (1) root moulds, which are tubular voids that outline positions of former, now decayed roots; (2) root casts, which are sediment‐ and/or cement‐filled root moulds; (3) root tubules, which are cemented cylinders around root moulds; (4) rhizocretions
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