Geoscience Reference
In-Depth Information
Exercise 2.1.
Estimate variograms for an outcrop image.
The image below shows an example
photo of bedding structures from an outcrop
section of a fluvial sedimentary sequence.
Redox reactions (related to paleo-
groundwater flows) give a strong visible
contrast between high porosity (white) and
low porosity (red) pore types. Micro
channels with lag deposits and soft-sediment
deformation features are also present.
Sketch estimated semivariogram func-
tions for the horizontal and vertical directions
assuming that colour (grey-scale) indicates
rock quality. The hammer head is 10 cm
across. Use the grey-scale image and
pixelated grey-scale images to guide you.
Grey scale image is 22.5
22.5 cm; pixelated grey-scale image is 55 by 55 pixels
