References
735
Parker, G.G., 1963. Piping, a geomorphic agent in landform development of the drylands. Int. Assoc. Sci.
Hydrol. Publ. 65, 103-113.
Parker, G.G., Jenne, E.A., 1967. Structural failure of Western US highways caused by piping, United
States Geological Survey. Water Resources Division, p. 27.
Parker, G.G., Higgins, G.C., Parker, G.G., Wood, W.W., 1990. Piping and pseudokarst in drylands.
In: Higgins, G.C., Coates, D.R. (Eds), Groundwater Geomorphology: The Role of Subsurface Water
in Earth-surface Processes and Landforms. Geological Society of America, Boulder, pp. 77-110,
Special Paper 252.
Parmenter, C., Folger, D.W., 1974. Eolian biogenic detritus in deep sea sediments: a possible index of
equatorial Ice Age aridity. Science 185, 695-698.
Parra, E., Capeda, H., 1990. Volcanic hazards maps of the Nevado del Ruiz volcano, Columbia.
J. Volcanol. Geotherm. Res. 42, 117-127.
Passarge, S., 1904. Die Kalahari: Versuch einer physisch-geographischen darstellung der sandfelden des
Siidafrikanischen beckens. Reiner, Berlin.
Passarge, S., 1931. Geomorfologfa. Ed. Labor, Barcelona, p. 189.
Patr-Cornell, E., 1996. Uncertainties in global climate change estimates. An editorial essay. Climatic
Change 33, 145-149.
Paterson, W.S.B., 1994. The Physics of Glaciers. Pergamon, New York, p. 480.
Pavich, M.J., 1985. Appalachian piedmont morphogenesis: weathering, erosion, and Cenozoic uplift. In:
Morisawa, M., Hack, J.T. (Eds), Tectonic Geomorphology. George Allen and Unwin, London, pp. 27- 51.
Pavlov, A.V., 1994. Current changes of climate and permafrost in the Arctic and Sub-Arctic of Russia.
Permafrost Periglac. Processes 5, 101 - 110.
Pearce, F., 1994. Not warming, but cooling. New Sci. 9, 37-41, July.
Prcsi, M., 1968. Loess. In: Fairbridge, R.W. (Ed.), The Encyclopedia of Geomorphology. Reinold,
New York, pp. 674-678.
Prcsi, M., Sailfird, J., 1970. Planated surfaces: principal problems of research and terminology. In:
Prcsi, M. (Ed.), Problems of Relief Planation. Akadrmiai Kiad6, Budapest, pp. 13-27.
Pedraza, J., Sanz, M.A., Martin, A., 1989. Formas Granfticas de La Pedriza. Agencia de Medio Ambiente,
Madrid, p. 205.
Pedro, G., 1966. Essai sur le caractrrisation grochimique des diffrrents processus zonaux rrsultant de
l'altrration superficielle. C. R. Acad. Sci. Paris 262, 1828-1831.
Pedro, G., 1968. Distributions des principaux types d'altrration chimique h la surface du globe. Rev.
Grogr. Phys. Grol. Dyn. 10, 457-470.
Pedro, G., Jamague, M., Bejon, J.C., 1969. Mineral interactions and transformations in relation to
pedogenesis during the Quaternary. Soil Sci. 107, 462-469.
Peel, R.F., 1974. Insolation weathering: some measurements of diurnal temperature changes in exposed
rocks in the Tibesti region, central Sahara. Z. Geomorph. - Suppl., 21, 19-28.
Peltier, L.C., 1950. The geographic cycle in periglacial regions as it is related to climatic geomorphology.
Ann. Assoc. Am. Geogr. 40, 214-236.
Peltier, W.R., Andrews, J.T., 1983. Glacial geology and glacial isostasy of the Hudson Bay region. In:
Smith, D.E., Dawson, A.G. (Eds), Shorelines and Isostasy. Academic Press, London, pp. 285-320.
Pefia, J.L., Chueca, J., Julifin, A., 1998. Los derrubios estratificados del sector central pirenaico: cronologfa
y lfmites altitudinales. In: G6mez Ortiz, A., Salvador Franch, F., Schulte, L., Garcfa Navarro, A. (Eds),
Procesos biof/sicos actuales en medios frfos. Publicaciones de la Universitat de Barcelona, Barcelona,
pp. 205- 216.
Pefia, J.L., Echeverrfa, M.T., Petit-Maire, N., Lafont, R., 1993. Cronolog/a e interpretacirn de las
acumulaciones holocenas de la Val de las Lenas (Depresirn del Ebro, Zaragoza). Geographicalia,
Zaragoza, 30, pp. 321-332.
Penck, A., 1905. Glacial features in the surface of the Alps. J. Geol. 13, 1-19.
Penck, W., 1924. Die Morphologische Analyse. Geogr. Abh. 2, Stuttgart, 1-283.
Penck, W., 1953. Morphological Analysis of Landforms. Macmillan, London, p. 429.
Prrez del Campo, P., 1989. Nuevos datos sobre colapsos kfirsticos en la Depresi6n del Ebro. Direccirn
e incidencia en la nueva lfnea de alta velocidad Madrid-Barcelona. II Reuni6n del Cuaternario Ibrrico,
Madrid, pp. 905-911.
Persons, B.S., 1970. Laterite: Genesis, Location and Use. Plenum Press, New York, p. 103.
Persons, B.S., 1984. Laterite, Engineering Geology. In: Finkl, C.W. (Ed.), The Encyclopedia of Applied
Geology. Van Nostrand Reinhold, New York, pp. 320-326.
735
Parker, G.G., 1963. Piping, a geomorphic agent in landform development of the drylands. Int. Assoc. Sci.
Hydrol. Publ. 65, 103-113.
Parker, G.G., Jenne, E.A., 1967. Structural failure of Western US highways caused by piping, United
States Geological Survey. Water Resources Division, p. 27.
Parker, G.G., Higgins, G.C., Parker, G.G., Wood, W.W., 1990. Piping and pseudokarst in drylands.
In: Higgins, G.C., Coates, D.R. (Eds), Groundwater Geomorphology: The Role of Subsurface Water
in Earth-surface Processes and Landforms. Geological Society of America, Boulder, pp. 77-110,
Special Paper 252.
Parmenter, C., Folger, D.W., 1974. Eolian biogenic detritus in deep sea sediments: a possible index of
equatorial Ice Age aridity. Science 185, 695-698.
Parra, E., Capeda, H., 1990. Volcanic hazards maps of the Nevado del Ruiz volcano, Columbia.
J. Volcanol. Geotherm. Res. 42, 117-127.
Passarge, S., 1904. Die Kalahari: Versuch einer physisch-geographischen darstellung der sandfelden des
Siidafrikanischen beckens. Reiner, Berlin.
Passarge, S., 1931. Geomorfologfa. Ed. Labor, Barcelona, p. 189.
Patr-Cornell, E., 1996. Uncertainties in global climate change estimates. An editorial essay. Climatic
Change 33, 145-149.
Paterson, W.S.B., 1994. The Physics of Glaciers. Pergamon, New York, p. 480.
Pavich, M.J., 1985. Appalachian piedmont morphogenesis: weathering, erosion, and Cenozoic uplift. In:
Morisawa, M., Hack, J.T. (Eds), Tectonic Geomorphology. George Allen and Unwin, London, pp. 27- 51.
Pavlov, A.V., 1994. Current changes of climate and permafrost in the Arctic and Sub-Arctic of Russia.
Permafrost Periglac. Processes 5, 101 - 110.
Pearce, F., 1994. Not warming, but cooling. New Sci. 9, 37-41, July.
Prcsi, M., 1968. Loess. In: Fairbridge, R.W. (Ed.), The Encyclopedia of Geomorphology. Reinold,
New York, pp. 674-678.
Prcsi, M., Sailfird, J., 1970. Planated surfaces: principal problems of research and terminology. In:
Prcsi, M. (Ed.), Problems of Relief Planation. Akadrmiai Kiad6, Budapest, pp. 13-27.
Pedraza, J., Sanz, M.A., Martin, A., 1989. Formas Granfticas de La Pedriza. Agencia de Medio Ambiente,
Madrid, p. 205.
Pedro, G., 1966. Essai sur le caractrrisation grochimique des diffrrents processus zonaux rrsultant de
l'altrration superficielle. C. R. Acad. Sci. Paris 262, 1828-1831.
Pedro, G., 1968. Distributions des principaux types d'altrration chimique h la surface du globe. Rev.
Grogr. Phys. Grol. Dyn. 10, 457-470.
Pedro, G., Jamague, M., Bejon, J.C., 1969. Mineral interactions and transformations in relation to
pedogenesis during the Quaternary. Soil Sci. 107, 462-469.
Peel, R.F., 1974. Insolation weathering: some measurements of diurnal temperature changes in exposed
rocks in the Tibesti region, central Sahara. Z. Geomorph. - Suppl., 21, 19-28.
Peltier, L.C., 1950. The geographic cycle in periglacial regions as it is related to climatic geomorphology.
Ann. Assoc. Am. Geogr. 40, 214-236.
Peltier, W.R., Andrews, J.T., 1983. Glacial geology and glacial isostasy of the Hudson Bay region. In:
Smith, D.E., Dawson, A.G. (Eds), Shorelines and Isostasy. Academic Press, London, pp. 285-320.
Pefia, J.L., Chueca, J., Julifin, A., 1998. Los derrubios estratificados del sector central pirenaico: cronologfa
y lfmites altitudinales. In: G6mez Ortiz, A., Salvador Franch, F., Schulte, L., Garcfa Navarro, A. (Eds),
Procesos biof/sicos actuales en medios frfos. Publicaciones de la Universitat de Barcelona, Barcelona,
pp. 205- 216.
Pefia, J.L., Echeverrfa, M.T., Petit-Maire, N., Lafont, R., 1993. Cronolog/a e interpretacirn de las
acumulaciones holocenas de la Val de las Lenas (Depresirn del Ebro, Zaragoza). Geographicalia,
Zaragoza, 30, pp. 321-332.
Penck, A., 1905. Glacial features in the surface of the Alps. J. Geol. 13, 1-19.
Penck, W., 1924. Die Morphologische Analyse. Geogr. Abh. 2, Stuttgart, 1-283.
Penck, W., 1953. Morphological Analysis of Landforms. Macmillan, London, p. 429.
Prrez del Campo, P., 1989. Nuevos datos sobre colapsos kfirsticos en la Depresi6n del Ebro. Direccirn
e incidencia en la nueva lfnea de alta velocidad Madrid-Barcelona. II Reuni6n del Cuaternario Ibrrico,
Madrid, pp. 905-911.
Persons, B.S., 1970. Laterite: Genesis, Location and Use. Plenum Press, New York, p. 103.
Persons, B.S., 1984. Laterite, Engineering Geology. In: Finkl, C.W. (Ed.), The Encyclopedia of Applied
Geology. Van Nostrand Reinhold, New York, pp. 320-326.