Although the designation "Hatrurim Formation" is often used as a locality name, it is really a geological unit, outcropping at many localities and spread over three countries.
See also Hatrurim Basin.

The Hatrurim Formation is largely composed of an unusual rock type, a type of natural Portland cement formed by high-temperature alteration of late Cretaceous to lower Eocene bituminous chalk, marl and impure limestone. Several of the type locality mineral species here had previously been intensively studied as anthropogenic phases in Portland cement. Unlike calc-silicate rocks in other parts of the world, which were normally created by contact metamorphism (heating by an igneous intrusion), the Hatrurim Formation is underlain by unaltered sedimentary rocks with no igneous intrusion. The origin of the heat that metamorphosed these rocks was long a mystery but is now thought to be due to oxidation of bituminous compounds (in simple English, it "burned"). Intensity of metamorphism correlates with access to oxygen. Hydrocarbons are widespread in surrounding rocks but are absent in the metamorphosed beds (the "Mottled Zone", an old name for the Hatrurim Formation).

The Hatrurim Formation was named for the locality Hatrurim, its largest area of exposure, but it also outcrops in several other parts of Israel, Palestine, and Jordan, too, so not all listed minerals may really be from Hatrurim. Many samples loosely labelled 'Hatrurim' ought really to have been labelled 'Hatrurim Formation' from other localities.

See under: Har Ye'elim, Hatrurim, Kefar Uriyya, Malhata, and Nahal Ayalon in Israel; Beit Sahur, Jebel Harmun, Ma'ale Adumim, Nabi Musa, and Tarqumiya in Palestine; Daba Siwaqa, Seweilih, and Maqarin in Jordan.

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Wikipedia:	https://en.wikipedia.org/wiki/Hatrurim_Formation

Localities in this Region

Other Regions, Features and Areas that Intersect

References