- Albania - The World Factbook (cia.gov)
After declaring independence from the Ottoman Empire in 1912, Albania experienced a period of political upheaval that led to a short-lived monarchy, which ended in 1939 when Italy conquered the country. Germany then occupied Albania in 1943, and communist partisans took over the country in 1944. Albania allied itself first with the USSR (until 1960) and then with China (until 1978). In the early 1990s, Albania ended communist rule and established a multiparty democracy.
- St. Peter Sandstone (Wikipedia)
The St. Peter Sandstone is an Ordovician geological formation. It belongs to the Chazyan stage of the Champlainian series in North American regional stratigraphy, equivalent to the late Darriwilian global stage. This sandstone originated as a sheet of sand in clear, shallow water near the shore of a Paleozoic sea and consists of fine-to-medium-size, well-rounded quartz grains with frosted surfaces. The extent of the formation spans north–south from Minnesota to Arkansas and east–west from Illinois into Nebraska and South Dakota. The formation was named by David Dale Owen (1847) after the Minnesota River, then known as the St. Peter River. The type locality is at the confluence of the Mississippi and Minnesota Rivers near Fort Snelling, Minnesota. In eastern Missouri, the stone consists of quartz sand that is 99.44% silica.