Last update: November 18th, 2019 at 11:00 am
Ash from eruptions, volcanic haze from Sierra Negra Volcano off the Sierra Negra obscures this image of the Galapagos Islands. The ash appears hazy, as opposed to the more solid-looking white and whitish-grey features (which are clouds). Sierra Negra is a shield volcano, which means that is wide with gently sloping sides, formed by the flow of very fluid lava
Therefore as the plate (on which the islands currently rest) moved over a column of hot magma or liquid rock. The volcano forms a hot rock like flow of this lava. The islands are located in the Pacific Ocean, about 1,000 kilometers (621 miles) west of South America; they belong to Ecuador.
The Galapagos are famous for their unique biodiversity and for a visit by the HMS Beagle in 1835. On board was Charles Darwin, then a recent divinity student and an aspiring naturalist eager to collect specimens in exotic locations. His observations of how variable individuals within a population (of a single species) are and how these variations are distributed in space.