All clay-based soils have the potential to change volume and shift with changes in the amount of moisture in the soil-and are sometimes called 'reactive soils' because of this. The amount that soil is likely to shift defines how 'reactive' it's considered to be.
Fortified Wine. Fortified wines are made from a still wine that has additional alcohol added to it, generally bringing the total alcohol by volume to the 17-20% mark. Popular types of fortified wines include: Port, Sherry, Marsala, and Madeira. Made from both red and white wines, with a sweet scene that runs from dry to semi-dry all the way to full blown sweet, the sweeter versions of fortified wines are popular dessert wines.
In general, the more popular styles are relatively simple and lack the complexity and length required in a good fortified wine. Alcohol allowance is 1 litre of spirits or 2 litres of sparkling or fortified wine plus 2 litres of still wine. Having said that, I do think there should be mention made of that formidable beast - the fortified wine.