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Qahlah Formation

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Journal Article
Published: 18 March 2021
Geological Magazine (2021) 158 (9): 1561–1571.
..., and almost entirely lacking in the geological record. Here we present evidence for serpentinization-induced fluid seepage in shallow-marine sedimentary rocks from the Upper Cretaceous (upper Campanian to lower Maastrichtian) Qahlah Formation at Jebel Huwayyah, United Arab Emirates. The research object...
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Series: Geological Society, London, Special Publications, Geological Society, London, Special Publications
Published: 01 January 2014
DOI: 10.1144/SP392.17
EISBN: 9781862396685
... and older Oman shelf sequences and subsequent uplift. The conglomerates belong to the Qahlah Formation of Late Cretaceous age, which is sandwiched between the Semail Ophiolite/Hawasina complex and Maastrichtian–Palaeogene carbonate rocks. The siliciclastics of the Qahlah Formation are the first sediments...
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Image
Outcrop picture of the <b>Qahlah</b> <b>Formation</b>. (a) The highly ferruginous basal p...
Published: 01 July 1998
Figure 5: Outcrop picture of the Qahlah Formation. (a) The highly ferruginous basal part of the unit, with serpentinite ‘S’. (b) The deeply weathered mudstone. (c) The upper part of the Qahlah Formation ‘Q’ overlain by the Simsima Formation ‘S’. Arrows point to some Actaeonella and rudist
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<b>Qahlah</b> <b>Formation</b> (Maastrichtian): conglomerate with  Omphalocyclus macropor...
Published: 01 July 1998
Figure 4: Qahlah Formation (Maastrichtian): conglomerate with Omphalocyclus macroporous (Lamarck) megalospheric generation. N.B. The juvenarium (Embryont).
Image
Photomicrograph of the <b>Qahlah</b> <b>Formation</b> under crossed-nicols. Bar is equal ...
Published: 01 July 1998
Figure 6: Photomicrograph of the Qahlah Formation under crossed-nicols. Bar is equal to 500 mμ. (a) Lateritic Ferruginous Mudstone ‘L’. (b) Clast Conglomerate with subrounded to subangular lithic clasts embedded in a matrix of sandy lime mud. (c) Clast Conglomerate showing part of a large altered
Journal Article
Journal: GeoArabia
Publisher: Gulf Petrolink
Published: 01 July 1998
GeoArabia (1998) 3 (3): 401–414.
...Figure 5: Outcrop picture of the Qahlah Formation. (a) The highly ferruginous basal part of the unit, with serpentinite ‘S’. (b) The deeply weathered mudstone. (c) The upper part of the Qahlah Formation ‘Q’ overlain by the Simsima Formation ‘S’. Arrows point to some Actaeonella and rudist...
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Journal Article
Journal: GeoArabia
Publisher: Gulf Petrolink
Published: 01 January 2009
GeoArabia (2009) 14 (1): 115–142.
... that places Maastrichtian Qahlah Formation laterite, sandstones and conglomerates and Simsima Formation rudist - Acteonellid gastropod limestones over all underlying allochthonous units is recognised throughout the Oman Mountains. SW-verging folds and thrusts in Triassic to Cretaceous carbonate slope facies...
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A view of the southeastern part of Jebel Rawdah showing an angular unconfor...
Published: 01 July 1998
Figure 4a: A view of the southeastern part of Jebel Rawdah showing an angular unconformity between Simsima Formation and the underlying Qahlah Formation. Note the camel marked by * for scale.
Image
Cross plot (δ 13 C v. δ 18 O) of Jebel Huwayyah Mound fluid conduit cements...
Published: 18 March 2021
Fig. 4. Cross plot (δ 13 C v. δ 18 O) of Jebel Huwayyah Mound fluid conduit cements, mound matrix and Qahlah Formation hardgrounds. Data from Table  1 .
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Field photos, Jabal Rawdah.  (a) Steeply dipping thin-bedded limestones wit...
Published: 01 January 2009
ophiolite Mantle sequence harzburgites thrust over Hawasina and Sumeini Group limestones, subsequently folded by a west-vergent recumbent fold. Semail Ophiolite, Hawasina and Sumeini Group rocks are all truncated by the Maastrichtian unconformity along the base of the Qahlah and Simsima formations. Bedding
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(a) Location map of the Jebel Huwayyah section (black star) near Al Ain, Un...
Published: 18 March 2021
Fig. 1. (a) Location map of the Jebel Huwayyah section (black star) near Al Ain, United Arab Emirates. S. Oph. – Semail ophiolite. (b) Field image of the Qahlah (Q.F.) and the Simsima formations (S.F.) at the Jebel Huwayyah section. White arrow indicates person for scale. (c) Simplified
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FIGURE 1 — Some examples of applications of the new terminology classifying...
Published: 01 October 2002
, Normandy, France; ca x 0.5. (B) Bivalve borings ( Gastrochaenolites ) in a cut and polished limestone pebble; the boring bivalves are endolithozoans ; Maastrichtian, Qahlah Formation, Jebel Huwayyah, Oman Mountains; NHM PEI327; x 7. (C) Cluster of barnacles ( Megabalanus ) attached to a bivalve shell
Image
Field photographs illustrating the style of deformation in the Upper Cretac...
Published: 01 October 2006
Jafnayn Formation near Tiwi (Site 23 in Figure 6 ). (c) Normal fault scarps in the Thanetian to Ypresian Jafnayn Formation near Umq (Site 24 in Figue 6 ). (d) Normal faults affecting the Maastrichtian Qahlah Formation in the Fanjah Graben (Site 31, location in Figure 8 ). (e) Tilted normal faults
Journal Article
Journal: GeoArabia
Publisher: Gulf Petrolink
Published: 01 July 2000
GeoArabia (2000) 5 (3): 387–402.
... at the surface is composed of the Maastrichtian Qahlah and Simsima formations unconformably overlain by shallow-marine carbonate rocks that are correlated on faunal grounds with the Middle Eocene Dammam Formation. The investigation of the Huwayyah Anticline has identified three microfacies of bioclastic...
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Journal Article
Journal: GeoArabia
Publisher: Gulf Petrolink
Published: 01 July 1998
GeoArabia (1998) 3 (3): 387–398.
...Figure 4: Qahlah Formation (Maastrichtian): conglomerate with Omphalocyclus macroporous (Lamarck) megalospheric generation. N.B. The juvenarium (Embryont). ...
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Outcrops of the <b>Qahlah</b>, Simsima and Dammam <b>formations</b>.
Published: 01 July 2000
Figure 4: Outcrops of the Qahlah, Simsima and Dammam formations.
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δ 18 O and δ 13 C values from the Jebel Huwayyah Mound (JHM) fluid conduit ...
Published: 18 March 2021
Table 1. δ 18 O and δ 13 C values from the Jebel Huwayyah Mound (JHM) fluid conduit cements, matrix cements and Qahlah Formation (QF) hardgrounds Sample Description δ 18 O (PDB) δ 18 O (SMOW) δ 13 C (PDB) Formation temperature (°C) UAE 1-A Early cement −2.2 28.6 −4.2 19
Journal Article
Journal: GeoArabia
Publisher: Gulf Petrolink
Published: 01 October 2002
GeoArabia (2002) 7 (4): 699–718.
... stratigraphic correlations were established within the outcropping Aruma Formation in Saudi Arabia. Biostratigraphy and sequence stratigraphy allowed a correlation framework to be proposed between the Aruma and the Qahlah and Simsima formations of the United Arab Emirates and the Oman Mountains...
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Journal Article
Journal: GeoArabia
Publisher: Gulf Petrolink
Published: 01 October 2006
GeoArabia (2006) 11 (4): 17–40.
... Jafnayn Formation near Tiwi (Site 23 in Figure 6 ). (c) Normal fault scarps in the Thanetian to Ypresian Jafnayn Formation near Umq (Site 24 in Figue 6 ). (d) Normal faults affecting the Maastrichtian Qahlah Formation in the Fanjah Graben (Site 31, location in Figure 8 ). (e) Tilted normal faults...
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—Lithostratigraphic interpretation of the Late Cretaceous <b>Qahlah</b>&#x2F;Simsima fo...
Published: 01 April 1995
Figure 14 —Lithostratigraphic interpretation of the Late Cretaceous Qahlah/Simsima formations in western Oman Mountains. Inset maps show locations mentioned in the text.