- Moscone Center (Wikipedia)
The George R. Moscone Convention Center (pronounced /mɒsˈkoʊni/), popularly known as the Moscone Center, is the largest convention and exhibition complex in San Francisco, California. The complex consists of three main halls spread out across three blocks and 87 acres (35 ha) in the South of Market neighborhood. The convention center originally opened in 1981. It is named after San Francisco former mayor George Moscone, who was assassinated in November 1978.
- Basalt (Wikipedia)
Basalt (UK: /ˈbæsɔːlt, -əlt/; US: /bəˈsɔːlt, ˈbeɪsɔːlt/) is an aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the surface of a rocky planet or moon. More than 90% of all volcanic rock on Earth is basalt. Rapid-cooling, fine-grained basalt is chemically equivalent to slow-cooling, coarse-grained gabbro. The eruption of basalt lava is observed by geologists at about 20 volcanoes per year. Basalt is also an important rock type on other planetary bodies in the Solar System. For example, the bulk of the plains of Venus, which cover ~80% of the surface, are basaltic; the lunar maria are plains of flood-basaltic lava flows; and basalt is a common rock on the surface of Mars.