|Latitude & Longitude (WGS84):||31° 13' 58'' North , 35° 16' 1'' East|
|Latitude & Longitude (decimal):||31.23278,35.26722|
|Köppen climate type:||BSh : Hot semi-arid (steppe) climate|
"Hatrurim Formation" is often used as a locality name, but it is really a geological unit, outcropping at many localities, spread over three countries.
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 which 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 to 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 late Gary Weinberger, who first found bentorite and sent it to a mineralogist for characterization, said that his discovery was made a short hike from the road "near" Arad.
The Hatrurim Formation was named for the locality Hatrurim, its largest area of exposure, but it also outcrops in several other parts of Israel and Palestine and Jordan too, so not all of the listed minerals may really be from Hatrurim, and many samples loosely labeled "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; and Beit Sahur, Jebel Harmun, Ma'ale Adumim, Nabi Musa, and Tarqumiya in Palestine; and Daba Siwaqa, Seweilih and Maqarin in Jordan.
Mineral ListMineral list contains entries from the region specified including sub-localities
157 valid minerals. 20 (TL) - type locality of valid minerals. 1 (FRL) - first recorded locality of unapproved mineral/variety/etc.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
66 - 145 Ma
|Cretaceous sedimentary rocks|