Calcareous sandstone a Route 2 near Zicron jacov

Kurkar ( /) is the term used in

Arabic Arabic (, , or , ) is a Central Semitic languages, Central Semitic language of the Afroasiatic languages, Afroasiatic language family spoken primarily in the Arab world. The International Organization for Standardization (ISO) assigns lang ...

and

modern Hebrew Modern Hebrew (, or ), also known as Israeli Hebrew or simply Hebrew, is the Standard language, standard form of the Hebrew language spoken today. It is the only surviving Canaanite language, as well as one of the List of languages by first w ...

for the rock type of which

lithified Lithification (from the Ancient Greek word ''lithos'' meaning 'rock' and the Latin-derived suffix ''-ific'') is the process in which sediments compact under pressure, expel connate fluids, and gradually become solid rock. Essentially, lithificati ...

sea sand dunes consist. The equivalent term used in

Lebanon Lebanon, officially the Republic of Lebanon, is a country in the Levant region of West Asia. Situated at the crossroads of the Mediterranean Basin and the Arabian Peninsula, it is bordered by Syria to the north and east, Israel to the south ...

is ramleh.

History

Kurkar is the regional name for an aeolian quartz sandstone with carbonate cement, in other words an

eolianite Eolianite or aeolianite is any rock formed by the lithification of sediment deposited by aeolian processes; that is, the wind. In common use, however, the term refers specifically to the most common form of eolianite: coastal limestone consisting ...

or a

calcarenite Calcarenite is a type of limestone that is composed predominantly, more than 50 percent, of detrital (transported) sand-size (0.0625 to 2 mm in diameter), Carbonate rock, carbonate grains. The grains consist of sand-size grains of either cor ...

(

calcareous Calcareous () is an adjective meaning "mostly or partly composed of calcium carbonate", in other words, containing lime (mineral), lime or being chalky. The term is used in a wide variety of Science, scientific disciplines. In zoology ''Calcare ...

sandstone Sandstone is a Clastic rock#Sedimentary clastic rocks, clastic sedimentary rock composed mainly of grain size, sand-sized (0.0625 to 2 mm) silicate mineral, silicate grains, Cementation (geology), cemented together by another mineral. Sand ...

or grainstone), found on the

Levant The Levant ( ) is the subregion that borders the Eastern Mediterranean, Eastern Mediterranean sea to the west, and forms the core of West Asia and the political term, Middle East, ''Middle East''. In its narrowest sense, which is in use toda ...

ine coast of the

Mediterranean Sea The Mediterranean Sea ( ) is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean basin and almost completely enclosed by land: on the east by the Levant in West Asia, on the north by Anatolia in West Asia and Southern Eur ...

Turkey Turkey, officially the Republic of Türkiye, is a country mainly located in Anatolia in West Asia, with a relatively small part called East Thrace in Southeast Europe. It borders the Black Sea to the north; Georgia (country), Georgia, Armen ...

Syria Syria, officially the Syrian Arab Republic, is a country in West Asia located in the Eastern Mediterranean and the Levant. It borders the Mediterranean Sea to the west, Turkey to Syria–Turkey border, the north, Iraq to Iraq–Syria border, t ...

Israel Israel, officially the State of Israel, is a country in West Asia. It Borders of Israel, shares borders with Lebanon to the north, Syria to the north-east, Jordan to the east, Egypt to the south-west, and the Mediterranean Sea to the west. Isr ...

, Francisc Dov Por. ''The Legacy of Tethys: An Aquatic Biogeography of the Levant.'' Pages 46-48, 54. Springer, New York, 1989, Monographiae Biologicae (Book 63), . "... around Tel Aviv ridges of aeolanitic sandstone ("kurkar") become prevalent. ..Along the Lebanese and most of the Syrian coast, calcareous rocks alternate with kurkar ridges. ..The vermetid platforms are especially well developed on the kurkar sandstones of the Israeli and southern Lebanese shores....

/ref> the

Gaza Strip The Gaza Strip, also known simply as Gaza, is a small territory located on the eastern coast of the Mediterranean Sea; it is the smaller of the two Palestinian territories, the other being the West Bank, that make up the State of Palestine. I ...

and northern

Sinai Peninsula The Sinai Peninsula, or simply Sinai ( ; ; ; ), is a peninsula in Egypt, and the only part of the country located in Asia. It is between the Mediterranean Sea to the north and the Red Sea to the south, and is a land bridge between Asia and Afri ...

. The kurkar ridges are prevalent on Israel's coast from the area of Tel Aviv northwards. South of

Mount Carmel Mount Carmel (; ), also known in Arabic as Mount Mar Elias (; ), is a coastal mountain range in northern Israel stretching from the Mediterranean Sea towards the southeast. The range is a UNESCO biosphere reserve. A number of towns are situat ...

they form parallel alignments, the result of transgressive coastlines.Maurice Schwartz (editor). ''Encyclopedia of Coastal Science.'' Page 74. Springer (Kluwer), Dordrecht, 2005, Encyclopedia of Earth Sciences Series,

/ref> Kurkar is the product of windblown quartzitic sands which created dunes during the

Pleistocene The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fin ...

, which were cemented by carbonates transforming them to sandstone (lithification process), forming successive ridges along the shore. Kurkar occurs on the shore as well as under the current sea level, on the continental shelf. There are three underwater sandstone ridges off the coast of Israel and two on land. The younger kurkar formations also build small islands or islets along the coast of Israel, Lebanon (at

Sidon Sidon ( ) or better known as Saida ( ; ) is the third-largest city in Lebanon. It is located on the Mediterranean Sea, Mediterranean coast in the South Governorate, Lebanon, South Governorate, of which it is the capital. Tyre, Lebanon, Tyre, t ...

and near Tripoli), and Syria (

Arwad Arwad (; ), the classical antiquity, classical Aradus, is a town in Syria on an eponymous List of islands of Syria, island in the Mediterranean Sea. It is the administrative center of the Arwad nahiyah, Subdistrict (''nahiyah''), of which it is ...

). In the

, coastal plain kurkar deposits of medium to coarse-grained calcareous sandstone are characterized by

crossbedding In geology, cross-bedding, also known as cross-stratification, is layering within a stratum and at an angle to the main bedding plane. The sedimentary structures which result are roughly horizontal units composed of inclined layers. The Principle ...

. Israel's coastal sand dunes, the habitat of many rare species of plants and animals, are made of kurkar interspersed with hamra, red sandy loam. Until the beginning of the 20th century, Palestine (then under the Ottoman Empire) had 285 square kilometers of kurkar and hamra formations. Due to construction, farming and the use of off-road vehicles, this has diminished to 109 square kilometers.

Biology

Kurkar ridges in Israel provide nesting sites for an endangered species of bird, the European

bee-eater The bee-eaters are a group of birds in the family (biology), family Meropidae, containing three genera and thirty-one species. Most species are found in Africa and Asia, with a few in southern Europe, Australia, and New Guinea. They are characte ...

; and nine species of wild plants native only to Israel, such as the coastal iris. Among the dominant plants on the ''kurkar'' ridge are lentisk (''Pistacia lentiscus'') and headed thyme (''Coridothymus capitatus''). The rare plants include French lavender (''Lavandula stoechas'') with its purple blooms, ''Paronychia palaestina'' and Galilee sea-lavender (''Limonium galilaeum''). In May 2009, an offshore pilot study was conducted in the northern

Galilee Galilee (; ; ; ) is a region located in northern Israel and southern Lebanon consisting of two parts: the Upper Galilee (, ; , ) and the Lower Galilee (, ; , ). ''Galilee'' encompasses the area north of the Mount Carmel-Mount Gilboa ridge and ...

by a team of scientists collecting geological, geophysical, geochemical and biological data in the vicinity of the Bustan Hagalil kurkar ridge. The ridge was mapped during the National Bathymetric Survey of Israel by multibeam

sonar Sonar (sound navigation and ranging or sonic navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances ( ranging), communicate with or detect objects o ...

References

External links

*{{cite journal , last1=Frechen , first1=Manfred , last2=Neber , first2=Alexander , last3=Tsatskin , first3=Alexander , last4=Boenigk , first4=Wolfgang , last5=Ronen , first5=Avraham , title=Chronology of Pleistocene sedimentary cycles in the Carmel Coastal Plain of Israel , journal=Quaternary International , date=January 2004 , volume=121 , issue=1 , pages=41–52 , doi=10.1016/j.quaint.2004.01.022 , bibcode=2004QuInt.121...41F Geology of Israel Sedimentary rocks

History

Biology

See also

References

External links