JURASSIC AND LOWER CRETACEOUS OF WADI HAJAR 



Row of limestone nodules in marl band, 16 m above base. 



Ammonites: Pachysphinctes hathyplocus (Waagen) [1]; 



Simaspidoceras argobbae (Dacque) [4]; Simaspidoceras 



irregidare (Dacque) [1]. 

 Calcareous mudstone, 13.4 m above base. Ammonites: 



Torquatisphinctes naifaensis sp. nov. [7]. 

 Marls, 12 m above base. Bivalves: Parainoce ramus sp. [ I ],Liostrea 



sp. [1]. 

 Limestone, 1.4 m above base. Perisphinctid indet. [1]. 



Naifa Formation, Billum Member: 



Shell Bed, 12 m below top. Bivalves: IPalaeonucula sp. [many]. 



Al Ma'abir road/river crossing, west side 



(N14°16'05"E48°33'33") 



Naifa Formation, Billum Member: 



Near base (gently dipping, against cliff). Ammonite: Ochetoceras 

 sp. indet. [1]. Brachiopods: Microthyhdina farquharsoni Muir- 

 'Wood[\3].B\\a\\es: Indogrammatodon egertonianus (SioWczkii) 

 [1], Modiolus sp. [2], ILimaria sp. [1], Nannogyra fourtaui 

 (Stefanini) [13], Actinostreon solitaria kindopeensis (Cox) [8], 

 Trigonia sp. [1]. 



Madbi Formation: 



Near top. Bivalves: Indogrammatodon egertonianus (Stoliczka) 

 [8], IModiolus sp., Nannogyra fourtaui (Stefanini) [7], 

 Actinostreon aff. solitaria (J. Sowerby) [2], Trigonia sp. [1], 

 INeocrassina sp. [1], Colpomya sp. [1]. 



Al Ma'abir, new road cutting, 0.5 km east of the 

 road/river crossing 



Naifa Formation, Billum Member: 



Upper part. Ammonite: Crussoliceras cf. wegelei Enay [1]. 

 Middle part. Bivalve: Indogrammatodon egertonianus (Stoliczka) 

 [1]. 



Al Ma'abir, from road 0.6 km south-east of river 

 crossing to 1 km eastwards (N14°15'59" 

 E48°34'01") 



Madbi Formation: 



1 m below top. Bivalves: Indogrammatodon egertonianus 

 (Stoliczka) [1], Limaria cf. mandawaensis Cox [1], Nannogyra 

 fourteaui (Stefanini) [2]. 



Upper Storm Bed, 30 m below top of formation. Ammonites: 



Perisphinctes s.s. sp. indet. [8]. Brachiopods: IConarosia sp. 

 [25], Microthyridina farquharsoni Muir-Wood [83]. Bivalves: 

 Indogrammatodon egertonianus (Stoliczka) [I], Modiolus cf. 

 bipartitus J. Sowerby [14], Camptonectes sp. [3], 'Chlamys' sp. 

 [1+], Eopecten cf. aubreyi (Douville) [1], Ctenostreon sp. [1], 

 Limaria cf mandawaensis Cox [7], Deltoideum delta (Smith) 

 [20], Nannogyra fourtaui (Stefanini) [29], Actinostreon aff. 

 solitaria (J. Sowerby) [27], Arctostrea eruca (Lamarck) [3], 

 Trigonia sp. [3], 'Lucina ' sp. [ 1 ], IMyoconcha sp. ['}i],Neocrassina 

 aff. unilateralis (J. de C. Sowerby) [22], Pseudotrapezium sp. of 

 Cox [1], IPleuromya sp. [1]. Gastropods: Bathrotomaria sp. [1], 

 Rhabdoconcha sp. [5]. 

 36-38 m below top. Brachiopods: Somalirhynchia africana Weir 



27 



[ 1 ], 5. arabica Cooper [38], S. somalica (Dacque) ['}>b],Avonothyris 

 sp. [13], Cererithyris cf wyvillei (Weir) [8], Dissoria obscura 

 Cooper [4], Eurysites transversus Cooper [19], IGyrosina ?sp. 

 nov. [1], Ornithella sp. [4], Ptyctothyris daghaniensis Muir- 

 Wood [12], 'Terebratula' aulites Stefanini [4J. Bivalves: 

 Indogrammatodon egertonianus (Stoliczka) [ 1 J, Arcomytilus '?sp. 

 nov. [I], Nannogyra fourtaui (Stefanini) [2], Actinostreon aff. 

 solitaria (J. Sowerby) [2], Trigonia sp. [1]. 

 Middle Storm Bed, 49 m below top. Ammonites: Perisphinctes sp. 

 indet. [2], Peltoceratoides sp. indet. [1]. Brachiopods: 

 Daghanirhynchia sp. [1], Septirhynchia sp. (juv.) [1], 

 Somalirhynchia somalica (Dacque) [7], Bihenithyris deformata 

 Cooper [5], Ptyctothyris daghaniensis Muir-Wood [4]. Bivalves: 

 Palaeonucula sp. [3], Indogrammatodon egertonianus (Stoliczka) 

 [14], Camptonectes sp. [1], Nannogyra fourtaui (Stefanini) [8], 

 Actinostreon aff. solitaria (J. Sowerby) [4], Trigonia sp. [1], 

 Neocrassina aff. unilateralis (J. de C. Sowerby) [6]. Gastropods: 

 Proconulus arabiensis (Newton) [28]. 



Shuqra Formation: 

 Upper Shuqra: 



Upper part. Bivalves: " Brachidontes' somalicus Cox [2], Modiolus 

 cf bipartitus J. Sowerby [1], Eligmus humei (Stefanini) [2], E. 

 aualites (Stefanini) [1], 'Gryphaea 'balli (Stefanini), IMyoconcha 

 sp. [1], Procyprina hunti (Cox) [1], Pseudotrapezium sp. of Cox 

 [1], Ceratomyopsis somaliensis (Weir) [1], Tellurimya ?sp. nov. 

 [1], Bucardiomya somaliensis (Cox) [1]. Gastropod: 

 1 Rhabdoconcha sp. [1]. 



17 m below top, rubbly marls and nodular limestones. Ammo- 

 nite: Erymnoceras (Pacherymnoceras) janyi (Douville) [1]. 



Loose. Brachiopods: Somalirhynchia africana Weir [19], 

 Somalirhynchia sp. [32], Avonothyris sp. [11], Cererithyris sp. 

 [18], Pleuraloma labiatum Cooper [1]. Echinoid: Holectypus sp. 

 [1]. Crinoid: IMillericrinus sp. [3]. 



Middle Shuqra: 



2-5 m below top. Ammonite: Erymnoceras (Pachyerymnoceras) 

 cf. janyi (Douville) [1]. Brachiopods: Somalirhynchia sp. [13], 

 Conarosia sp. [3], Dissoria obscura Cooper [10], 'Loboidothyris' 

 aethiopoca Weir [17]. Crinoid: IMillericrinus sp. [2]. Corals: 

 (not yet determined). Stromatoporoid: Shuqraia sp. [1]. Bivalves: 

 "Brachidontes' somalicus Cox [2], Modiolus cf bipartitus J. 

 Sowerby [1], Eligmus humei (Stefanini) [2], Eopecten cf. aubreyi 

 (Douville) [2], 'Giyphaea' balli (Stefanini) [5], Actinostreon 

 solitaria (J. Sowerby) [1], 'Lucina' sp. [1], Procyprina hunti 

 (Cox) [2], Ceratomyopsis somaliensis (Weir) [2], Ceratomva cf 

 wimmisensis (Gillieron) [1]. Gastropods: Rhabdoconcha sp. [5], 

 Ampullospira sp. [3]. 



Lower part. Bivalves: lAntiquicyprina sp. [15]. Gastropods: 

 INerinella sp. [39], lAmpullospira sp. [9]. 



Lower Shuqra: 



28.5 m above base. Brachiopods: Daghanirhynchia sp. [2]. 



15.25 m above base. Bivalves: IPalaeonucula sp. [1], 'Gryphaea' 

 balli (Stefanini) [2], 



10.5 m above base. Brachiopods: Daghanirhynchia cf. macfadyeni 

 Muir-Wood [16], D. daghaniensis Muir-Wood [57]. Echinoids: 

 Acrosalenia wyvillei Currie [2], Hemicidaris gregoni Currie [ I ]. 

 Metacrosalenia pseudocidaroides (Currie) [3]. Bivalves: 

 IPalaeonucula sp. [2], 'Gryphaea 'balli Stefanini [ I ], 'IProcyprina 

 hunti (Cox) [II], Pseudotrapezium sp. of Cox [ I ], lEomiodon sp. 

 [1]. Gastropods: Ampullospira sp. [2]. 



Loose. Brachiopods: Daghanirhynchia cf macfadyeni Muir-Wood 



