A mountain rising some 600-700 m above the surrounding plain is underlain by a central biotite granite around which, on the northern side, is an arcuate intrusion of gabbro/diorite around which again is a separate circular intrusion of syenite. The gabbro/diorite rocks comprise poikilitic kaersutite, plagioclase (An83-20), titanaugite, biotite and magnetite. The syenites are made of perthite, aegirine, augite and fayalite which may be rimmed by green amphibole. Up to 10% quartz is present with accessory apatite, sphene, allanite and zircon. Plagioclase- biotite lamprophyre dykes occur around the intrusion as well as feldspar-free analcime melteigites. Analyses for major and trace elements, including REE and Sr isotopes, and some mineral data will be found in Eby (1985a) and Pb isotopes in Eby (1985b).