Illustrative notes of the geomorphological map of the upper Arma Valley (Stura di Demonte Valley, Maritime Alps)

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Abstract

The present-day morphology of the upper Arma Valley (Maritime Alps) is the result of the complex interaction among glacial, periglacial, gravitational, running water, anthropogenic, karstic and structural processes. The overall geometry of the valley is related to the main thrusts separating the Brianconnais, Subbrianconnais and Dauphinois Domains. Although most glacial and periglacial processes are no longer active, present-day cryoclast processes, mostly on the southern flanks, are still feeding the numerous gravitational debris-fans, slope talus and debris-flow fans. The reconstructed glaciers that once occupied the Cavera and Serour valleys, likely coeval, gave a similar ELA of about 2100 m asl. Embryonic protalus rock glaciers have been found on almost every northern slope above 1800-2000 m, while other larger rock glaciers have developed from lateral and frontal moraines. Because of the widespread presence of soluble rocks, most of the Valley is characterized by ephemeral channels and other surface karstic features that have developed both on rocks and deposits. The presence of clays, derived from weathered schists, have brought about the formation of badlands, also favored by freeze and thaw processes. Finally, the upper Cavera Valley S-facing flank is widely affected by a complex deep-seated gravitational movement that is responsible for the presence of several trenches along the slope and doubled-crests along the divide.

Original languageEnglish
Pages (from-to)117-125
Number of pages9
JournalSupplementi di Geografia Fisica e Dinamica Quaternaria
Volume30
Publication statusPublished - 2007

Keywords

  • geomorphological map
  • Arma Valley
  • Maritime Alps

Cite this

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title = "Illustrative notes of the geomorphological map of the upper Arma Valley (Stura di Demonte Valley, Maritime Alps)",
abstract = "The present-day morphology of the upper Arma Valley (Maritime Alps) is the result of the complex interaction among glacial, periglacial, gravitational, running water, anthropogenic, karstic and structural processes. The overall geometry of the valley is related to the main thrusts separating the Brianconnais, Subbrianconnais and Dauphinois Domains. Although most glacial and periglacial processes are no longer active, present-day cryoclast processes, mostly on the southern flanks, are still feeding the numerous gravitational debris-fans, slope talus and debris-flow fans. The reconstructed glaciers that once occupied the Cavera and Serour valleys, likely coeval, gave a similar ELA of about 2100 m asl. Embryonic protalus rock glaciers have been found on almost every northern slope above 1800-2000 m, while other larger rock glaciers have developed from lateral and frontal moraines. Because of the widespread presence of soluble rocks, most of the Valley is characterized by ephemeral channels and other surface karstic features that have developed both on rocks and deposits. The presence of clays, derived from weathered schists, have brought about the formation of badlands, also favored by freeze and thaw processes. Finally, the upper Cavera Valley S-facing flank is widely affected by a complex deep-seated gravitational movement that is responsible for the presence of several trenches along the slope and doubled-crests along the divide.",
keywords = "geomorphological map, Arma Valley, Maritime Alps",
author = "Matteo Spagnolo",
year = "2007",
language = "English",
volume = "30",
pages = "117--125",
journal = "Supplementi di Geografia Fisica e Dinamica Quaternaria",
issn = "1724-4757",

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TY - JOUR

T1 - Illustrative notes of the geomorphological map of the upper Arma Valley (Stura di Demonte Valley, Maritime Alps)

AU - Spagnolo, Matteo

PY - 2007

Y1 - 2007

N2 - The present-day morphology of the upper Arma Valley (Maritime Alps) is the result of the complex interaction among glacial, periglacial, gravitational, running water, anthropogenic, karstic and structural processes. The overall geometry of the valley is related to the main thrusts separating the Brianconnais, Subbrianconnais and Dauphinois Domains. Although most glacial and periglacial processes are no longer active, present-day cryoclast processes, mostly on the southern flanks, are still feeding the numerous gravitational debris-fans, slope talus and debris-flow fans. The reconstructed glaciers that once occupied the Cavera and Serour valleys, likely coeval, gave a similar ELA of about 2100 m asl. Embryonic protalus rock glaciers have been found on almost every northern slope above 1800-2000 m, while other larger rock glaciers have developed from lateral and frontal moraines. Because of the widespread presence of soluble rocks, most of the Valley is characterized by ephemeral channels and other surface karstic features that have developed both on rocks and deposits. The presence of clays, derived from weathered schists, have brought about the formation of badlands, also favored by freeze and thaw processes. Finally, the upper Cavera Valley S-facing flank is widely affected by a complex deep-seated gravitational movement that is responsible for the presence of several trenches along the slope and doubled-crests along the divide.

AB - The present-day morphology of the upper Arma Valley (Maritime Alps) is the result of the complex interaction among glacial, periglacial, gravitational, running water, anthropogenic, karstic and structural processes. The overall geometry of the valley is related to the main thrusts separating the Brianconnais, Subbrianconnais and Dauphinois Domains. Although most glacial and periglacial processes are no longer active, present-day cryoclast processes, mostly on the southern flanks, are still feeding the numerous gravitational debris-fans, slope talus and debris-flow fans. The reconstructed glaciers that once occupied the Cavera and Serour valleys, likely coeval, gave a similar ELA of about 2100 m asl. Embryonic protalus rock glaciers have been found on almost every northern slope above 1800-2000 m, while other larger rock glaciers have developed from lateral and frontal moraines. Because of the widespread presence of soluble rocks, most of the Valley is characterized by ephemeral channels and other surface karstic features that have developed both on rocks and deposits. The presence of clays, derived from weathered schists, have brought about the formation of badlands, also favored by freeze and thaw processes. Finally, the upper Cavera Valley S-facing flank is widely affected by a complex deep-seated gravitational movement that is responsible for the presence of several trenches along the slope and doubled-crests along the divide.

KW - geomorphological map

KW - Arma Valley

KW - Maritime Alps

M3 - Article

VL - 30

SP - 117

EP - 125

JO - Supplementi di Geografia Fisica e Dinamica Quaternaria

JF - Supplementi di Geografia Fisica e Dinamica Quaternaria

SN - 1724-4757

ER -