Weathering Rinds on Quartzarenite Clasts as a Relative-Age Indicator and the Glacial Chronology of Mount Timpanogos, Wasatch Range, Utah

Anderson, Larry W.; Anderson, Donna S.

doi:10.2307/1550623

Cited by 33 publications

(17 citation statements)

References 13 publications

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“…tephra, have poorly developed soil horizons, are typically within 50 m of modem glacier termini, have sparse vegetation cover on their slopes, and are -60 m high with sharp crests. These LIA deposits are also analogous to young glacial deposits observed in other regions of the western United States such as Washington (Burrows et aI., 2000;Crandell, 1969;Miller, 1969) and Utah (Anderson and Anderson, 1981;Madsen and Currey, 1979). From local tree ring records and other land based temperature data, the LIA advance at Three Sisters likely took place within the last 150 -200 yrs.…”

Section: Discussionsupporting

confidence: 61%

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A Tale of Three Sisters: Reconstructing the Holocene glacial history and paleoclimate record at Three Sisters Volcanoes, Oregon, United States

Marcott¹

2000

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Section: Discussionsupporting

confidence: 61%

“…(Carver, 1972;Lafrenz, 2001;LilIquist, 1988;Scott, 1974;Scott et aI., 1990) and the western United States (Anderson and Anderson, 1981;Burrows et aI., 2000;Crandell, 1969;Madsen and Currey, 1979;Miller, 1969). Three Sisters occurred during the mid Holocene (2.5 -8.0 ka.…”

Section: Minimums Maximumsmentioning

confidence: 99%

A Tale of Three Sisters: Reconstructing the Holocene glacial history and paleoclimate record at Three Sisters Volcanoes, Oregon, United States

Marcott¹

2000

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“…Some authors (e.g. Anderson and Anderson, 1981;Chinn, 1981;Colman, 1981;Colman and Pierce, 1981;Oguchi 2004) consider that the thickness of the rind is indicative of age. Others (e.g.…”

Section: Discussionmentioning

confidence: 99%

Changes of porosity due to weathering in quartzites and slates of a Raña profile (Montes de Toledo, Central Spain)

Ballesteros¹,

Talegón²,

Fernández³

et al. 2013

Estud. geol.

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Rañas are alluvial fan deposits of Plio-Pleistocene age that form the piedmont platforms around the mountains in the interior of the Iberian Peninsula. They are composed of cobbles, pebbles and gravels of quartzite and some quartz, all embedded within a clayey matrix displaying striking changes in hues due to hydromorphism. Beneath these platforms, the Hercynian basement is consistently deeply weathered. In the profile of the Raña, the quartzite stones located into the clayey horizon have a weathering rind that is whitish to ochre in colour, in contrast to the dark reddish hue of those located within the leaching horizon, just below the land surface. These differences are related to changes in the physical properties (e.g., bulk density and porosity), mineralogy (presence of oxyhydroxides) and weathering processes that have taken place in the profile. Such processes have led to the corrosion and replacement of the quartz grains by the iron oxyhydroxides. The main cause is the dramatic changes in the water regime occurring in the pores at the surfaces of the quartzite stones. Due to weathering the slates outcropping beneath the Raña have undergone important release of matter (ca. 30%), together with changes in the mineral association, with a progressive reduction in the component of the unweathered slates and an increase in new minerals (smectites, kaolinite and iron oxyhydroxides) upwards.Keywords: porosity, weathering rinds, quartzite stones, slates, piedmont. RESUMENLas Rañas son depósitos de abanicos aluviales del Plio-Pleistoceno que forman plataformas de piedemonte alrededor de las montanas del interior de la Peninsula Iberica. Estan formadas de bloques, cantos y gravas de cuarcita dominantes y algún cuarzo engastados en una matriz arcillosa que muestra importantes contrastes de color causados por hidromorfismo. Bajo estas plataformas, el zocalo hercinico se encuentra profundamente alterado.En un perfil de Rana se distinguen dos tipos de horizontes: i) el superior, de pocos decimetros de grosor, rico en cantos, gravas, arena y limo, pero pobre en arcilla, y ii) el inferior, normalmente de algunos metros de grosor y rico en arcillas. Dependiendo de su situacion dentro del perfil de la Rana, los cantos y gravas de cuarcita situados en el horizonte rico en arcillas presentan una corteza de alteracion de tonos ocres a blancos, en contraste con los situados en horizonte de lavado inmediatamente bajo la superficie, que presentan una corteza de alteracion de intenso color rojo. Estas diferencias están relacionadas con cambios en las propiedades fisicas (p. ej. densidad aparente y porosidad), en la mineralogia (presencia de oxihidroxidos) y en los procesos de alteracion que han ocurrido en el perfil y que han llevado incluso a la corrosion y reemplazo de granos de cuarzo por oxihidroxidos de Fe. La causa principal han sido los cambios hidricos ocurridos en los poros de los cantos y gravas de cuarcita. Las pizarras alteradas que aparecen bajo la Rana presentan una importante pérdida de materia (ca. 30%) y ca...

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“…Although several problems and potential sources of error are associated with relative dating (BENEDICT, 1967;BIRKELAND, 1973, WEBBER andANDREWS, 1973;JOCHIMSEN, 1973;WOR-SLEY, 1981), parameters such as lichen size (CALKIN and ELLIS, 1980;DOWDESWELL, 1984), weathering rind thickness (ANDERSON and ANDERSON, 1981 ;GELLATLY, 1984) and soil properties (CROCKER and DICKSON, 1956;BIRKE-LAND, 1978) have been used repeatedly with apparent success.…”

Section: Les Reliefs En Creux Et En Bosses Causés Par Les Glissementsmentioning

confidence: 99%

Age of Rotational Landslides in the Cypress Hills, Alberta-Saskatchewan

Goulden¹,

Sauchyn²

2007

gpq

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ABSTRACTThe topography of the west block of the Cypress Hills indicates that fluvial dissection of the plateaux and subsequent rotational landsliding of valley sides have been the dominant Quaternary geomorphic processes. This paper presents a preliminary chronology of rotational landslides based on the relative ages of 17 landslides and on 3 absolute dates. Four indices of relative age were used: organic content in Ah and B soil horizons, the size and coverage of lichens and weathering rind thickness on boulders exposed by landsliding, and the concavity and gradient of gullies in landslide debris, One landslide occurred in 1965. Organic materials collected from buried soil horizons beneath depressions on 3 other landslides were radiocarbon dated at 1235 ± 105, 1635 ± 105 and 7259 ± 165 yrs. BP. Microscopic analysis of the organic material revealed that the oldest sample was contaminated with older carbon. Cluster analysis of the relative age data in conjunction with 3 acceptable absolute dates suggests that the landslides under study have occurred during late Holocene time.

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Weathering Rinds on Quartzarenite Clasts as a Relative-Age Indicator and the Glacial Chronology of Mount Timpanogos, Wasatch Range, Utah

Cited by 33 publications

References 13 publications

A Tale of Three Sisters: Reconstructing the Holocene glacial history and paleoclimate record at Three Sisters Volcanoes, Oregon, United States

A Tale of Three Sisters: Reconstructing the Holocene glacial history and paleoclimate record at Three Sisters Volcanoes, Oregon, United States

Changes of porosity due to weathering in quartzites and slates of a Raña profile (Montes de Toledo, Central Spain)

Age of Rotational Landslides in the Cypress Hills, Alberta-Saskatchewan

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