Tinta Barroca  is another Portuguese grape used in Port wines.  It was introduced to the Douro region in the 19th Century and planted on the north facing slopes.   It has since been planted in South Africa as a varietal wine or in a red Pinotage blend.  Intense heat can cause the berries to shrivel and as such are usually planted away from reflected river light on northern slopes to protect their intense berry flavors from becoming cooked.  Ports are usually made in a handful of styles:  Ruby (meant to be consumed young), Tawny (which are aged in barrels to allow minor oxidative aging and nutty flavors), Late Bottle Vintage (usually bottled 4-6 years after vintage, but doesn’t age well), and Vintage Port (which usually requires 10-40 years of bottle aging and made from a specific vintage, allowing for tertiary spicy hazelnut aromas ).