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Konso Formation

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Journal Article
Published: 01 January 2006
Journal of the Geological Society (2006) 163 (1): 185–204.
... of tuffs that is derived is consistent with 40 Ar/ 39 Ar ages reported separately, and provides the stratigraphic framework for interpreting those ages. Further, new correlations are established to the Konso Formation in southern Ethiopia. As drainage from the Ethiopian Rift to the Omo–Turkana Basin...
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 Chronological distribution of named and correlated tuffs in the five groups. Correlations and probable correlations with tuffs of the Konso Formation are also shown. Ages given by Katoh et al. (2000) are increased by 0.93% to account for the different ages used for the monitor (Fish Canyon Sanidine) by the two laboratories. Units that have been dated are shown in bold. The column labelled P shows palaeomagnetic polarity (black is normal); the column labelled MH shows marker horizons used along western Koobi Fora ridge.
Published: 01 January 2006
Fig. 8.  Chronological distribution of named and correlated tuffs in the five groups. Correlations and probable correlations with tuffs of the Konso Formation are also shown. Ages given by Katoh et al . (2000) are increased by 0.93% to account for the different ages used for the monitor (Fish
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(A) Synthetic stratigraphic logs of the Kibish, Konso, and Herto Bouri formations in Ethiopia, showing tephrostratigraphic correlations that provide minimum ages for the Homo sapiens fossils Omo I (Vidal et al. 2022a) and Herto (Clark et al. 2003), and source eruptions (stars). SVT = Silver Tuff; KHS = Kamoya’s Hominid Site Tuff; LHM = Lower Herto Member; UHM = Upper Herto Member; and WAVT = Waidedo Vitric Tuff. Modified from Vidal et al. (2022a). (B) Major element abundances and trace element ratios of glasses from the ca. 233-ka Shala Qi2 eruption, the ca. 177-ka Corbetti eruption, the Kibish KHS and ETH18-8 tuffs, and Konso TA-56 tuffs in (A). Major element data are normalized to 100% anhydrous. Error bars shown are relative standard deviations, rescaled to the value of the center point. Published data for the Herto WAVT and Konso TA-55 tuffs are not compared with data plotted here because of the different analytical methods used. Modified fromVidal et al. (2022a).
Published: 01 April 2023
Figure 4. ( A ) Synthetic stratigraphic logs of the Kibish, Konso, and Herto Bouri formations in Ethiopia, showing tephrostratigraphic correlations that provide minimum ages for the Homo sapiens fossils Omo I ( Vidal et al. 2022a ) and Herto ( Clark et al. 2003 ), and source eruptions (stars
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 Map of the lower Omo Valley of Ethiopia and the northern part of Lake Turkana in Kenya showing the Koobi Fora, Nachukui, and Shungura Formations as light stipple. Numbered points east of the lake refer to palaeontological collection areas. Section names are given for the Shungura and Nachukui Formations. The location of Konso is shown in the inset.
Published: 01 January 2006
and Nachukui Formations. The location of Konso is shown in the inset.
Journal Article
Journal: Elements
Published: 01 April 2023
Elements (2023) 19 (2): 88–95.
...Figure 4. ( A ) Synthetic stratigraphic logs of the Kibish, Konso, and Herto Bouri formations in Ethiopia, showing tephrostratigraphic correlations that provide minimum ages for the Homo sapiens fossils Omo I ( Vidal et al. 2022a ) and Herto ( Clark et al. 2003 ), and source eruptions (stars...
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Journal Article
Published: 15 June 2023
Journal of the Geological Society (2023) 180 (4): jgs2022-171.
... ; Brown and Feibel 1986 ; Harris et al. 1988 ). Ash beds in the Omo Group and Konso Formation, Ethiopia are thought to be sourced from volcanic centres within the axial zone of the Main Ethiopian Rift ( WoldeGabriel et al. 2005 ), but the source volcanic centres have yet to be identified. Although...
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Journal Article
Published: 01 January 2006
Journal of the Geological Society (2006) 163 (1): 205–220.
... to occur elsewhere in the basin in the Shungura and Nachukui Formations. In addition, some of the tuffs have been identified outside the Turkana Basin, and, in particular, in sections in the Konso region of southern Ethiopia. At Konso in the southwestern part of the Main Ethiopian Rift, about 180 km NE...
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Journal Article
Published: 01 March 2012
Journal of the Geological Society (2012) 169 (2): 213–226.
..., followed by 3.4 m of tuffite showing indistinct stratification. Brown et al. (2006) estimated the age of Tuff J at 1.76 Ma. Based on the low-iron principal mode, Rogers (2010) correlated the Orange Tuff with Tuff J of the Shungura Formation, and also with the Kayle Tuff-1 of the Konso Formation...
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Journal Article
Published: 01 December 2022
Jour. Geol. Soc. India (2022) 98 (12): 1633–1646.
... zircon ( Hancher and Watson, 2003 ). Earlier investigation by Pandit and Panigrahi (2012 ) reported that zircon saturation temperature for the Malanjkhand granitoid ranges 700-919°C which is identical with the crystallization temperature of magma responsible for the formation of leucogranites...
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Journal Article
Published: 01 April 1987
Journal of the Geological Society (1987) 144 (2): 213–226.
... Ethiopian volcanic formations with special references to the chronological and stratigraphic problems of the 'Trap Series' Geodynamic Evolution of the Afro-Arabian Rift System 1980b 47 Roma Accademia Nazionale dei Lincei 231 52 Journal of the Geological Society, London, Vol. 144, 1987, pp. 213...
Journal Article
Journal: Economic Geology
Published: 01 January 2004
Economic Geology (2004) 99 (1): 203–217.
... melt inclusions in pegmatitic quartz —Ilya V. Veksler, Rainer Thomas, and Richard Wirth 1724 On the formation of peridotite-derived Os-rich PGE alloys —Frank E. Brenker, Anders Meibom, and Robert Frei 1731 Viscosity of hydrous rhyolitic melts inferred from kinetic experiments, and a new...
Journal Article
Published: 22 July 2016
Journal of the Geological Society (2017) 174 (1): 142–156.
... and abuse of crust-formation ages . Geology , 15 , 893 – 895 . Asrat , A. & Barbey , P. 2003 . Petrology, geochronology and Sr–Nd isotopic geochemistry of the Konso pluton, south-western Ethiopia: Implications for transition from convergence to extension in the Mozambique Belt...
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Journal Article
Journal: Clay Minerals
Published: 01 September 2024
Clay Minerals (2024) 59 (3): 228–257.
... during arid period Foerster et al. ( 2012 ) Clay chemistry reflection 060 Chew Bahir, Ethiopia CB-01, CB-03, CB-05 4.1–6.3°N 36.5–38.1°E Palaeolake Last 20 kyr Formation of authigenic clays during low lake level Foerster et al. ( 2018 ) Clay mineralogy Turkana, Kenya LT84-2P 03°08’S...
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Journal Article
Published: 01 February 1990
Journal of the Geological Society (1990) 147 (1): 41–57.
... crustal accretion between about 1000 to 650 Ma (Bakor et al. 1976; Greenwood et al. 1980; Gass 1977, 1981). However, others favoured repeated rifting of an Archaean to mid-Proterozoic craton involving the formation and closure of small ocean basins (Kroner 1979; Stern 1981; Kemp et al. 1980; Delfour 1980...
Series: Geological Society, London, Special Publications
Published: 01 January 2005
DOI: 10.1144/GSL.SP.2005.247.01.13
EISBN: 9781862394957
... on the surface of the Kasibos Formation ( Ditchfield et al. 1999 ). The earliest currently known Acheulean assemblage is dated to c. 1.4 Ma at Konso ( Asfaw et al. 1992 ) and it is unlikely that the Kasibos Formation artefacts predate this. Various species have their last appearance in the 1.0-0.5 Ma...
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Series: Geological Society, London, Special Publications
Published: 01 January 2005
DOI: 10.1144/GSL.SP.2005.247.01.17
EISBN: 9781862394957
... at Peninj in Tanzania ( Dominguez-Rodrigo et al. 2001 ), and handaxes are widespread in Africa by 1.4 Ma, e.g. site EF-HR at Olduvai ( Walter et al. 1991 ), and Konso Gardula in Ethiopia ( Asfaw et al. 1992 ). Today there is something of a consensus that the original conceptualization of Out...
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