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Roadcut exposure of the Rio Blanco Quartz Diorite, used for illustrative purposes to conceptualize the subsurface weathering system at Guaba Ridge within the Rio Icacos watershed of the Luquillo Critical Zone Observatory in Puerto Rico. The rindlet zone, approximately delineated between the solid line (bedrock-rindlet interface) and the dashed line (rindlet-saprolite interface), overlies the corestones of bedrock and is the zone of active weathering targeted in this study. Scale bar equals 10 cm. The inset at left shows a plan view of the rindlet zone exposed elsewhere.
Roadcut exposure of the Rio Blanco Quartz Diorite, used for illustrative purposes to conceptualize the subsurface weathering system at Guaba Ridge within the Rio Icacos watershed of the Luquillo Critical Zone Observatory in Puerto Rico. The rindlet zone, approximately delineated between the solid line (bedrock-rindlet interface) and the dashed line (rindlet-saprolite interface), overlies the corestones of bedrock and is the zone of active weathering targeted in this study. Scale bar equals 10 cm. The inset at left shows a plan view of the rindlet zone exposed elsewhere.
FE-SEM images of biotite at the whole grain scale (left) and basal plane (right). Note the differences in scale on whole grain images as individual grain sizes are variable. For consistency, basal plane images are at the same scale. The approximate area of the basal plane presented is outlined in white on the grain scale images. Note the ragged appearance of the basal plane observed after microbial incubation.
FE-SEM images of biotite at the whole grain scale (left) and basal plane (right). Note the differences in scale on whole grain images as individual grain sizes are variable. For consistency, basal plane images are at the same scale. The approximate area of the basal plane presented is outlined in white on the grain scale images. Note the ragged appearance of the basal plane observed after microbial incubation.
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