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40d:Chasm

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This article is about an older version of DF.

Chasms are a feature that appear infrequently in Template:Lous Template:Ls. They are a Template:L system identified by not having a Template:L on the lowest level (which is instead marked # and described as "Chasm" when looked at).

Chasms come in two forms: standard chasms, which look something like a river system (a bottomless "Grand Canyon"), and "bottomless pits", which are like a Template:L without the magma. Chasms are much more common on named mountains and Template:Les, along with other special features such as Template:Ls.<is this still true?> Chasms may either be open to the sky, or fully Template:L and not visible until breached by a miner, at which point the entire chasm is revealed. When this happens, the game will pause with the Template:L "You have discovered a large chasm cleft through the mountain." or "You have discovered a deep pit in the mountain.".

Chasms are not visible on the Region/World maps or the Local maps by default, but can be turned visible by setting SHOW_EMBARK_CHASM (for tributaries) and SHOW_EMBARK_PIT (for pits) to ALWAYS in Template:L. They must also be set to be shown during Template:L. On the local map, standard chasms will show up as a gray '#' (usually a line of them) and a bottomless pit as a gray "" / '○' (the Template:L also used for Template:Ls).

The presence of Extreme Template:Ls (20+) on the Local Map is sometimes indicative of a chasm, though this may be coincidental.[Verify]

Forms

Standard

The beginning of a standard chasm appears similar to the fringed tributary section of a brook sometimes seen in mountain areas, and the rest looks pretty much like the watercourse of a brook or river (though with small caves in the walls). Appears as # on the embark map if enabled.

Standard chasm showing lowermost level descending to the depths

Bottomless pit

Note: See Template:L for other uses.

A bottomless pit, also called a vent chasm, has a similar appearance to a magma pipe, except it does not contain magma. Appears as on the embark map if enabled.

Chasm.PNG

Uses

Garbage dump

Chasms provide a convenient method for permanently disposing of any unwanted items. Simply designate a Template:L on a walkable tile adjacent to the chasm, then mark your unwanted items for dumping. Template:L can be used to automatically dump particular types of refuse. If the chasm is inhabited by Template:L, Template:L may cancel the dump task if the creatures are too close, even if they are technically unreachable. v0.28.181.40d

Historical note: In the 2D version, there were no activity zones, and items marked for "chasming" would be automatically tossed into the chasm. Additionally, the chasm could spawn monsters, and dumping things into the chasm would provoke attacks. Pouring a sufficient amount of Template:L into the chasm would exterminate them (and a red line would be displayed along the center of the chasm to denote this). This no longer occurs in the current version.

Platform-chasming

A technique of dumping by building a platform over the chasm, and then severing the platform from the Template:L, to permanently dispose of garbage, excess Template:L or Template:L set on top. The severed platform will disappear into the darkness below, never to be seen again.

Resources

Chasms are frequently home to Template:Ls and Template:Ls, making them a potential source of Template:L and Template:L. As the chasm exposes every layer to view, they provide access to easily identified resources such as Template:L deposits and Template:Ls.

Hazards

Template:L fighting near the edges of cliffs have a propensity to dodge right off the precipice, falling to their deaths.

The chasm is also home to many types of hostile creatures, including Template:L, Template:Ls, Template:Ls, Template:L, Template:Ls, Template:L, Template:L, Template:Ls and Template:Ls.

Adventurers Beware

Creatures will spawn near chasms every time you enter the region, leading to the death of any fortress you visit. This only applies to adventure mode. A sure formula for Template:L!

Worlds