Let's Build a Setting! "The Verdant Fissure"

[Zorku]

The term you're looking for is "anastomosing river". It's essentially many parallel rivers connected by channels that flow between them to create a lot of islands. If the canyon was cut by a large anastamosing river, the "islands" would become massive towers or plateaus that divide the canyon into many smaller interwoven canyons. It looks similar to a "braided river" which has many small islands of sediment such as sand bars, but an anastomosing river has more permanent islands of solid material (or sediment with a lot of plants to bind them together so they don't erode and change like sand bars do, but that's not relevant to our canyon).

Spoiler: Anastomosing river

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That seems hard to believe without a water collection system on one end and large outlet on the other, and I'm not so sure that folks have meant that kind of directionality up to this point, but if you want to actually write that into an entry then we can default to a long strip of land where we mostly refer to what's North or South* of a location, and what's East or West if we happen to actually populate the width of the fissure.

*They don't need to literally be North and South. They're just the primary axis. The fissure could run mostly East-West relative to the planet but tilted by about ten degrees, and we'd still call it North and South just because it's easier to think of directions on a roughly rectangular area like that. Unless people were really into that whole compass contraption, which seems significantly less useful here, I suspect they would orient things in whatever way they found easiest to draw or otherwise represent for giving people directions.

31) The Dajra Plateau
Standing atop steep cliffs, but well away from either side of the fissure, lies the Southernmost civilization that the Vaoruhpti have and any political awareness of (and perform some meager trade with.) It's not entirely clear how their various yak and llama like livestock were able to scale the cliffs, which usually require extensive climbing gear for humanoids to ascend, but the recent installation of some very large scale lifts has allowed them to start exporting members of their overcrowded herds. Although the meat on these animals is comparable to other common livestock, the indigenous peppercorns that grow on the plateau have given the meet a particularly positive reputation, and the previous scarcity in surrounding areas relegated this to the luxurious indulgences of rich nobles. The dwarves are quite proud of this investment, and plan to take a sizeable, but fair, cut of the profits for several generations.