Before revision: Deeper in the mantle, the Discovery hotspot appears to connect with the Shona and Tristan hotspots to a single plume, which in turn emanates from the African superplume .
After revision: and might form a "curtain" of hotspots at the edge of the superplumeDeeper in the mantle, the Discovery hotspot appears to connect with the Shona and Tristan hotspots to a single plume, which in turn emanates from the African superplume .