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https://doi.org/10.1111/gbi.12576
Figure 1
Archetypal large spherical aggregate (SA) microfossils with wide, kerogen-free surrounding rinds. Microfossil shape is most commonly spherical, with radial symmetry. All images are vertical cross sections through bedding. (a) Plane polarised light (PPL) image of slightly ellipsoidal SAs oriented with long axes perpendicular to bedding; note the even width of rinds. Dense, bedded organic matter (OM) that directly underlies the left SA appears to be deflected downwards, around the SA and its surrounding rind (arrow). (b, c) and (d, e) show specimens in both PPL and cross polarised light (XPL), highlighting the very fine microquartz grainsize within the rinds (arrow in e). Carbonate rhombs are occasionally observed intruding into microfossil rinds; these are visible in a (left SA, right side of rind), in b, c (left side of rind), and in e (right side of rind).
(Follow above link for more Figures.)
Figure 1
Archetypal large spherical aggregate (SA) microfossils with wide, kerogen-free surrounding rinds. Microfossil shape is most commonly spherical, with radial symmetry. All images are vertical cross sections through bedding. (a) Plane polarised light (PPL) image of slightly ellipsoidal SAs oriented with long axes perpendicular to bedding; note the even width of rinds. Dense, bedded organic matter (OM) that directly underlies the left SA appears to be deflected downwards, around the SA and its surrounding rind (arrow). (b, c) and (d, e) show specimens in both PPL and cross polarised light (XPL), highlighting the very fine microquartz grainsize within the rinds (arrow in e). Carbonate rhombs are occasionally observed intruding into microfossil rinds; these are visible in a (left SA, right side of rind), in b, c (left side of rind), and in e (right side of rind).
(Follow above link for more Figures.)
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