9/21/2023 0 Comments Rose diagram geologyIn situations like this, the crossbed foresets are more likely to present an apparent dip direction, rather than true direction of flow. However, it is more common to find crossbed cross-sections in 2-dimensional exposures like cliffs and road-cuts. In such cases, measured bearings for individual bedforms provides a unique sense of flow. Identifying any of these is reasonably straight forward knowing what to measure can be a bit tricky.Īsymmetric current ripple and dune bedforms exposed on bedding planes can be measured by noting the facing direction of lee slopes (face down current – see the image above). It all begins with a humble crossbed, flute cast, or current aligned object. Knowing the direction of sediment transport will help you decipher paleoenvironments and sedimentary facies, paleoslope dip directions, possible sources of sediment, and the location of sediment sinks. Identifying sedimentary structures that indicate paleocurrent directions is an important task in any study of sedimentary rocks.
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