hammadan.

/haˈmɑːdə/

Forms: Also hamada(h).

Etymology: < Arabic ḥammāda.

Geology.

A flat rocky area of desert blown free of sand by the wind, typical of the Sahara.

ΘΚΠ

the world > the earth > land > landscape > wild or uncultivated land > [noun] > barren land or desert > specific

Sahara1613

sertão1816

mallee1851

hammada1853

erg1875

1853 J. Richardson Narr. Mission Central Afr. II. iv. 60 Aghadez is situated on a hamadah, or lofty plateau of sandstone and granite formation.

1857 H. Barth Trav. & Discov. N. & Central Afr. I. v. 133 Overweg and I had no time to lose in preparing for our journey over the hammáda, or plateau.

1886 Encycl. Brit. XXI. 149/2 Nearly all the rest of the Sahara consists..of undulating surfaces of rock (distinguished as hammada),..and regions of sandy dunes.

1934 W. Fitzgerald Africa i. ii. 60 Rocky wastes with the bare exposure of fissured rocks as dominant features of the scene, form the ‘hamada’ type of the Sahara.

1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) IV. 76/2 Ordinarily, a hammada is a bare rock surface composed of relatively flat-lying consolidated sedimentary rocks from which overlying softer sediments have been stripped, principally by wind erosion.

This entry has not yet been fully updated (first published 1976; most recently modified version published online December 2020).

单词	hammada
释义	hammadan. /haˈmɑːdə/ Forms: Also hamada(h). Etymology: < Arabic ḥammāda. Geology. A flat rocky area of desert blown free of sand by the wind, typical of the Sahara. ΘΚΠ the world > the earth > land > landscape > wild or uncultivated land > [noun] > barren land or desert > specific Sahara1613 sertão1816 mallee1851 hammada1853 erg1875 1853 J. Richardson Narr. Mission Central Afr. II. iv. 60 Aghadez is situated on a hamadah, or lofty plateau of sandstone and granite formation. 1857 H. Barth Trav. & Discov. N. & Central Afr. I. v. 133 Overweg and I had no time to lose in preparing for our journey over the hammáda, or plateau. 1886 Encycl. Brit. XXI. 149/2 Nearly all the rest of the Sahara consists..of undulating surfaces of rock (distinguished as hammada),..and regions of sandy dunes. 1934 W. Fitzgerald Africa i. ii. 60 Rocky wastes with the bare exposure of fissured rocks as dominant features of the scene, form the ‘hamada’ type of the Sahara. 1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) IV. 76/2 Ordinarily, a hammada is a bare rock surface composed of relatively flat-lying consolidated sedimentary rocks from which overlying softer sediments have been stripped, principally by wind erosion. This entry has not yet been fully updated (first published 1976; most recently modified version published online December 2020). < n.1853
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