noun, Ecology. 1. a system, or a group of interconnected elements, formed by the interaction of a community of organisms with their environment. 2. any system or network of interconnecting and interacting parts, as in a business: The success of Appleâs ecosystem depends on hardware/software integration.
Two Types of Impact Craters. Impact craters can be categorized in one of two ways: simple or complex. A simple crater has a smooth bowl shape small with a small depth to diameter ratio. This ratio is typically 1:6 which means that if the crater is 1 m deep, it is 6 m wide.
Andesite, dacite and rhyolite lavas are the primary types of lava that form these volcanoes. Eruptions on the volcanoes often alternate between tephra and lava flows. Subduction zone volcanoes. Geologists often use the term stratovolcanoes to describe the mountains that form in subduction zones.