Folds are bends in rock layers produced when rocks deform under stress. They are common in mountain belts and sedimentary basins, where compression, burial
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A Geological Society of America announcement on 14 October 2026 highlighted a gathering focused on how changing water resources shape riverscapes and commu
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Sedimentary structures form as particles are transported, deposited and modified. Bedding, cross-bedding, ripple marks, graded layers and mud cracks can pr
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A river delta forms where a river enters a standing body of water and deposits sediment faster than waves, tides and currents can remove it. Deltas ar
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Alluvial fans are fan-shaped sediment deposits that form where streams emerge from confined valleys onto flatter terrain. They are common in arid and
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Karst landscapes develop where soluble rocks, especially limestone, are dissolved by water. Sinkholes, disappearing streams, springs and caves are sur
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A rock sample without reliable location and context loses much of its scientific value. Provenance links a specimen to the outcrop, geological unit an
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Good field geology begins with planning and respect for the site. Responsible observation protects people, geological features and the evidence that f
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Coastal fieldwork brings together sedimentology, geomorphology and ocean processes. Cliffs, beaches, dunes and tidal platforms preserve evidence of ch
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A river transect is a structured way to observe how channel form and sediment change from one bank to the other. It links visible landforms with the m
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