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Differentiating etch, epigene, and subaerial landforms

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As they are usually defined it is difficult to distinguish between etch and epigene, and epigene and subaerial landforms. Etch forms are exposed weathering fronts but features caused by the erosion of weathered rock developed on previously exposed etch surfaces (second phase etching) can be classified as epigene. Subaerial forms are due to erosion without prior weathering. They exist, but are relatively scarce.

Obwohl eigentlich klar definiert, ist es (im Gelände) oft schwierig zwischen Lösungsformen und epigenen Landformen, beziehungsweise zwischen epigenen und subaerischen Landformen zu unterscheiden. Lösungsformen sind freigelegte Verwitterungs fronten. Merkmale, die durch die Erosion von verwittertem Gestein auf zuvor freigelegten Lösungsoberflächen (Lösungsprozesse der zweiten Phase) hervorgerufen worden sind, werden alsepigen eingestuft. Subaerische Formen sind auf Erosion ohne vorherige Verwitterung zurückzuführen. Sie existieren, sind aber verhältnismäßig selten.

Les définitions usuelles rendent difficiles la distinction entre les etch formes (résultat de la corrosion) et epigenes (resultat du processus exterieur), et entre des formes epigenes et subaerienne. Les formes etch sont des fronts d'altération exposés, mais les traits causes par l'érosion des roches exposés aux intempéries qui s'est developpée sur des surfaces etch précedemment exposées (etching seconde phase) peuvent etre classifiés comme epigenes. Les formes subaeriennes sont causées par l'érosion sans altération anterieur. Elles existent, mais elles sont relativement rares.
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Document Type: Research Article

Publication date: March 1, 2009

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  • Zeitschrift für Geomorphologie main volume is a peer-reviewed international journal presenting original contributions of high scientific standard from all fields of geomorphology, encompassing basic research and applied studies. Zeitschrift für Geomorphologie (ZfG) invites the submission of original papers from the entire field of geomorphological research, both applied and theoretical. Authors are encouraged to submit their papers to the editor-in-chief. Please peruse the instructions to authors (PDF) before submitting your paper.

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