DR MORLEY READ / SCIENCE PHOTO LIBRARY DR MORLEY READ / SCIENCE PHOTO LIBRARY
Folded rock strata. View of rock strata exposed during road building, showing layers of folded rock (coloured white, at centre). Originally, these strata of rock were laid down as horizontal layers. Since then they have been tipped and folded by geologic forces, so that the white strata are entirely folded back in a synclinal (trough-shaped) formation. Photographed north of Quito, Ecuador.
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