Common Jusassic fossil algae from Tuwaiq mountain limestone central Saudi Arabia

• Saleh M. Okla ^[1]
  1. [1] King Saud University

     King Saud University

     Arabia Saudí

     
• Localización: Revista española de micropaleontología, ISSN 0556-655X, Vol. 23, Nº. 2, 1991, págs. 89-100
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • Selected surface sections of Tuwaiq Mountain Limestone (Middle to Upper Callovian) were measured near the city of Riyadh (lat. 24º36’N, Long. 46º40’E) in central Saudi Arabia. The Tuwaiq Mountain Limenstone is generally 200 meters thick in the studied area, but only the upper 40 meters of this rock unit were selectively sampled to prove the presence of fossil algae. These fossil algae are abundant but some dasycladacean species are relatively more common. The later include; Heteroporella jaffrezoi, Heteroporella lemmensis, Salpingoporella annulata, Petrascula cf. piai and Clypeina cf, jurassica. Other fossil algae are the blue-green alga Cayeuxia piae and the incertae sedis alga Thaumatoporella parvovesiculifera.

    The Tuwaiq Mountain Limestone is not only a prominent lithostratigraphic unit in central Saudi Arabia, but also an important oil producer in eastern Saudi Arabia. It has also been sighted as a source rock for much of the oil produced from the Upper Jurassic rock units in Saudi Arabia.