The contact surface between upper and lower receiver functions as an unconventional bedding surface.
2.
It is characterized by short, curvilinear, non-branching, parallel-sided, unlined traces on bedding surfaces.
3.
The receiver's large bedding surface is mated to an aluminium alloy-bedding block by three screws for maximum stability.
4.
The SSSI citation for Smart Quarry specifies the importance of " abundant, bivalve produced, stellate feeding traces on a bedding surface " within the Namurian quartzite of the quarry.
5.
If the amphibolite appears to transgress apparent protolith bedding surfaces it is an ortho-amphibolite, as this suggests it was a sill and thin metamorphosed lava flows may be more troublesome.
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