Granite is a felsic or acidic rock. A vesicle is a cavity formed by expanding gas during the cooling of an extrusive igneous rock. A good example of vesicles are those found in pumice. If a vesicle is filled in by a secondary mineral it is described as an amygdale.
InformAfrica â Kisii County is a district in the Nyanza Province of southwestern Kenya, and is mostly inhabited by the Gusii tribe or Kisii people. Kisii is the capital town of Kisii county. As of 2010, Kisii county has 7 constituencies which are: Bobasi, Bonchari, Bomachoge, Kitutu Chache, Nyaribari Chache, Nyaribari Masaba, and South Mugirango.
Located in between Kampala and Mombasa, Nairobi stretches itself across 684 square kilometers of land. It lies adjacent to the eastern edge of the rift valley and is situated 5450 ft (1661 metres) above the sea level. The Ngong hills occupy the western part of the city. Mount Kenya is located to the North of the city and Mount Kilimanjaro lies towards south-east of Nairobi. The Nairobi River along with its tributaries passes through the Nairobi Province. The City Square is located in the heart of the city and the Kenyan Parliament buildings, Nairobi Law Courts, Kenyatta Conference Centre, the Holy Family Cathedral and the Nairobi City Hall surround the square.