Matmor Formation

Matmor Formation
Stratigraphic range: Middle Jurassic

Matmor Formation (foreground and middle ground) in Hamakhtesh Hagadol, Israel.
Type Sedimentary
Underlies Hatira Formation
Overlies Zohar Formation
Primary Limestone
Other Marl
Region Negev
Country Israel
Extent Southern Israel
Type section
Named for Matmor, Israel
Named by Hirsch and Roded (1996)

The Jurassic Matmor Formation is the name given to the thick 100 meter unit that is exposed in Hamakhtesh Hagadol. The Matmor Formation contains fossils from a Jurassic equatorial shallow marine environment. Bivalves, gastropods, sponges, corals, echinoderms, and sclerobionts are present in the Matmor Formation to various degrees (Wilson et al., 2010). The stratigraphy of the Matmor Formation consists of alternating layers of limestone and marl (Hirsch and Roded, 1996).


The Iraq Petroleum Company originally described the Jurassic sequence in Hamakhtesh Hagadol of Israel in the 1930s (Hudson, 1958). These findings were later described and published by Blake (1935). Shaw (1947) published a limited summary of the stratigraphy. Hudson (1958) later subdivided the rocks into the Callovian, Divesian, Argovian, Sequanim biostratigraphic stages. In 1963, Goldberg subdivided the section into the Zohar, Kidod and Be'er Sheva formations. Goldberg (1963) further divided the Zohar formation into the Ziyya and Madsus members. In 1966, Mayac dated the Callovian and what appeared to be the Lower Oxfordian stages with forams (Mayac, 1966, in Hirsch and Roded, 1996). Further biostratigraphic work by Hirsch et al. (1998) and Grossowicz et al. (2000) show that the Matmor Formation is entirely Upper Callovian.


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