Confusing geography terms, explained in a gorgeous antique map

VOX revealed this impressive imaginary map (circa 1870) from the David Rumsey Collection that manages to define many geographical terms without needing text.

A few of the more confusing terms merit some clarification, so we referred to the Oxford English Dictionary on the following:

What’s the difference between a gulf and a bay? They’re pretty similar, but a bay is often wider and has a wider opening to the sea. At the same time, some gulfs are larger than many bays (like the Gulf of Mexico). There’s bound to be some confusion, since the terms are often used interchangeably.

A cascade is a small waterfall.

Channel versus strait versus passage versus sound? A channel and strait both connect bodies of water, but a channel is often wider. A sound is like a strait, but larger. A passage typically connects bodies of water between islands. However, the terms are often used interchangeably.

Check out the rest of the article and a full size version of the glorious map at VOX.