- Gettysburg, Pennsylvania (Wikipedia)
Gettysburg (/ˈɡɛtizbɜːrɡ/; locally /ˈɡɛtɪsbɜːrɡ/) is a borough in Pennsylvania and the county seat of Adams County, Pennsylvania, the United States. As of the 2020 census, the borough had a population of 7,106 people.
- Silicate mineral (Wikipedia)
Silicate minerals are rock-forming minerals made up of silicate groups. They are the largest and most important class of minerals and make up approximately 90 percent of Earth’s crust.