21. Earlier during the Sveconorwegian orogeny mafic rocks ( gabbro-diorite ) were emplaced. 22. Diorite had already been used by old Sumerian rulers ( Statue of Entemena ).23. Diorite results from the partial melting of a mafic rock above a subduction zone.24. The predominant igneous rock is porphyritic hornblende diorite . 25. Most of the mineral deposits are close to the quartz diorite -schist contact. 26. These strata have diorite and granodiorite intrusions, probably formed in the Cretaceous Period. 27. These are cut by diorite and quartz diorite dikes, stocks, and sills. 28. These are cut by diorite and quartz diorite dikes, stocks, and sills. 29. The materials included granite, diorite and alabaster. 30. Granodiorite, tonalite and diorite are most common intrusive rocks found in continental arcs.
