On Venus, this region constantly heats up except for periods every hundred million years which release that heat.  
On Venus, this region constantly heats up except for periods every hundred million years which release that heat.  The bottom part of this layer on Earth contains post-perovskite and is sometimes denoted D double prime. The upper part generally contains the same rocks as Gros Morne National Park such as peridotite, and much of it contains olivine [OL-uh-veen]. The upper part contains the asthenosphere, and its upper boundary—located by a Croatian scientist tracking seismic waves—is the Mohorovičić [moh-khor-oh-VIH-chik] discontinuity, or Moho. Containing most of the Earth's volume, name this region between the core and the crust.
On Venus, this region constantly heats up except for periods every hundred million years which release that heat.  
mantle