Gulf of Trieste Gulf of Trieste The Gulf of Trieste (, , , ) is a very shallow bay of the Adriatic Sea, in the extreme northern part of the Adriatic Sea. It is part of the Gulf of Venice and is shared by Italy, Slovenia and Croatia. It is closed to the south by the peninsula of Istria, the largest peninsula in the Adriatic Sea, shared between Croatia and Slovenia. The entire Slovenian sea is part of the Gulf of Trieste. The gulf is limited by an imaginary line connecting the Punta Tagliamento on the Italian and Savudrija ("Punta Salvore") on the
Gulf of Suez Rift the area now occupied by the rift was a shallow sea depositing carbonates. This period was mainly quiet tectonically but the northern part of the gulf region was affected by periodic far-field effects of the Alpine orogeny. A series of WSW-ENE trending extensional basins were inverted, creating isolated uplifted and folded areas known as 'Syrian arc' structures. These structures were mainly active during the Late Santonian but there is evidence of further movements on the same structures at the end of the Cretaceous and during the Paleogene. Rifting began along the whole of the Red Sea -Gulf of Suez rift