St. Louis County, Missouri. St. Louis County is a county located in the far eastern portion of Missouri. It is bounded by the Mississippi River, the Missouri River, the Meramec River, and the state of Illinois. As of the 2015 Census Bureau population estimate, the population was 1,003,362, making it the most populous county in Missouri.
Mount Vesuvius is best known for its eruption in AD 79 that led to the burying and destruction of the Roman cities of Pompeii, Herculaneum and several other settlements.t was then built up by a series of lava flows, with some smaller explosive eruptions interspersed between them. However, the style of eruption changed around 19,000 years ago to a sequence of large explosive plinian eruptions, of which the 79 AD one was the most recent.
The 79 A.D. eruption of Vesuvius was the first volcanic eruption ever to be described in detail. From 18 miles (30 km) west of the volcano, Pliny the Younger, witnessed the eruption and later recorded his observations in two letters.t has not erupted since then, but Vesuvius is an active volcano, it will erupt again. The oldest dated rock at Mt Vesuvius is about 300,000 years old. It was collected from a well drilled near the volcano.