Great Rift Valley support its current biological variety. The southern section of the Rift Valley includes Lake Malawi, the third-deepest freshwater body in the world, reaching in depth and separating the Nyassa plateau of Northern Mozambique from Malawi; it ends in the Zambezi valley. Great Rift Valley The Great Rift Valley is a continuous geographic trench, approximately in length, that runs from Lebanon's Beqaa Valley in Asia to Mozambique in Southeastern Africa. The name continues in some usages, although it is today considered geologically imprecise as it combines features that are today regarded as separate, although related, rift and fault systems. Today, the
Volcanic history of the Northern Cordilleran Volcanic Province of the Omineca and Bear rivers, The Thumb rises with a topographic prominence of above gently sloping benchland near the crest of the Connelly Range. It is the largest among a cluster of seven steep-sided volcanic plugs associated with dikes, lava flows and remnants of cinder cones. Ne Ch'e Ddhawa, an extinct volcano in the Fort Selkirk Volcanic Field of central Yukon, reaches a height of near the junction of the Pelly and Yukon rivers. It was erupted subglacially under the Cordilleran Ice Sheet between 0.8 and one million years ago, depositing hyaloclastite tuffs, breccias and pillow breccias that now