- Alexandria (en.wikivoyage.org)
Alexandria (pronounced al-ig-ZAN-dree-uh ; Arabic: الإسكندرية / اسكندرية al-Iskandariyya / Eskendereyya ) is Egypt’s second largest city (5.2 million people in 2018), its largest seaport, and the country’s window onto the Mediterranean Sea. The city is a faded shadow of its former glorious cosmopolitan self, but still worth a visit for its many cultural attractions – particularly the new Library of Alexandria – and still-palpable glimpses of its past.
- Foliation (geology) (Wikipedia)
Foliation in geology refers to repetitive layering in metamorphic rocks. Each layer can be as thin as a sheet of paper, or over a meter in thickness. The word comes from the Latin folium, meaning “leaf”, and refers to the sheet-like planar structure. It is caused by shearing forces (pressures pushing different sections of the rock in different directions), or differential pressure (higher pressure from one direction than in others). The layers form parallel to the direction of the shear, or perpendicular to the direction of higher pressure. Nonfoliated metamorphic rocks are typically formed in the absence of significant differential pressure or shear. Foliation is common in rocks affected by the regional metamorphic compression typical of areas of mountain belt formation (orogenic belts).