| Scientists believe that below the lithosphere is a relatively narrow, mobile zone in the mantle called the asthenosphere. |
| Melts of these metasomites were volatile rich and hence ascended rapidly through the lithosphere, forming the lamprophyre magmas. |
| An alternative to an active mantle thermal anomaly is greater stretching of the mantle lithosphere than the crust. |
| Across the ridge, the asymmetric flow pattern in the asthenosphere will cause differential drag at the base of the lithosphere. |
| As you pull the lithosphere apart, as it separates, decompression occurs in the earth's mantle underneath the spreading centre. |
| After new oceanic crust forms, the lithosphere cools and thickens as it moves away from the ocean ridge. |
