Courtesy of Ernst ten Haaf. Sedimentary rock forms from rock fragments, sand, mud, and other materials that are compacted and cemented together at Earth’s surface. The materials that …

Rock, or stone, is a hard material made up of one or more minerals. Rock makes up the outer layer of Earth, called the crust. The lower parts of this layer are solid rock, or…

Tozeur, oasis in west-central Tunisia.It is located to the south of Tunisia’s steppe region in the jarīd (palm) country, which displays a colourful landscape marked by numerous chott (or shaṭṭ, …

On this day in 1940, the first transport of Polish political prisoners arrived at Auschwitz, which became Nazi Germany's largest concentration, extermination, and slave-labour camp, where …

5 days ago · Relief. Tunisia is characterized by moderate relief. The Tunisian Dorsale, or High Tell, a southwest-northeast–trending mountain range that is an extension of the Saharan Atlas …

Britannica’s new platform provides content designed and written specifically for early learners. Creating a more engaging and fun learning experience for students, the activities in Britannica …

What is rock music? Rock music is a form of popular music that emerged in the 1950s and can be defined as “a form of music with a strong beat”—it is d

May 12, 2025 · Rock - Structure, Texture, Composition: Physical properties of rocks are of interest and utility in many fields of work, including geology, petrophysics, geophysics, materials …

Apr 17, 2025 · Rock - Social Change, Cultural Evolution, Music Revolution: How, then, should rock’s contribution to music history be judged? One way to answer this is to trace rock’s …

May 12, 2025 · rock, in geology, naturally occurring and coherent aggregate of one or more minerals. Such aggregates constitute the basic unit of which the solid Earth is composed and …