Microclimate controls on weathering, based on rephotography of an outcrop in Kansas, USA, with educational applications
Reams, Max W.
published: Aug 1, 2016
ArtNo. ESP023106003003, Price: 29.00 €
Rephotography at outcrop scale offers opportunities to observe changes that are useful for scientific and educational purposes. North- and south-facing exposures of Upper Carboniferous marine limestones and shales on a rural highway in eastern Kansas, USA, were rephotographed over a 37-year period. Photographs taken at different seasons recorded changes due to rock weathering. The north-facing outcrop showed a stronger weathering effect than the south-facing exposure. The sequence of photographs can help university students understand microclimate controls on weathering, why a sense of rock abundances in nature is biased by the influences of weathering and vegetation cover, and how to gain a sense of geologic time by mentally extrapolating photographic sequences.