Which Italian wine region is known for marine soils and notable red wines?

The Italian wine region known for marine soils and notable red wines is Tuscany. The region's unique geological profile includes sediments from ancient marine environments, which contribute significantly to the complexity and mineral characteristics of its wines. Tuscany is particularly famous for its red wine production, especially Sangiovese-based wines like Chianti, Brunello di Montalcino, and Vino Nobile di Montepulciano.

In addition to its maritime influence, Tuscany's diverse microclimates and hilly landscape further enhance the expressiveness and quality of its wines. The combination of grapes, terroir, and traditional winemaking methods has established Tuscany as a leading producer of fine red wines globally.

While Piedmont, Veneto, and Umbria also produce esteemed wines, their soil types and notable varieties differ. Piedmont is renowned for Barolo and Barbaresco, which are more commonly associated with clay and limestone soils. Veneto is famous for Prosecco and Valpolicella, while Umbria is known for wines like Sagrantino, which thrive in different local conditions.