Editing 40d:Chasm

Chasms appear similarly to rivers, but are not visible on the Local/Region/World maps.  They are similar to the DFv0.23 chasms except that they are not guaranteed, seem to use the same river-generation code for the fortress map (a "chasm tributary" has been observed), and occupy all depths.

Chasms are much more common on named [[mountain]]s and [[volcano]]es, along with other special features such as [[cave river]]s.

Chasms are possibly the only feature that can create Extreme Cliffs (20+) that may be observed on the Local Map.

Chasms can also appear in a rounded shape, as below:

[[Image:chasm.PNG]]

== Uses ==
These uses are meant to be used with the lowermost level of the chasm. (Where you can see no lower)

=== Platform-chasming ===
A technique of building a platform over the chasm, and then severing the platform from the wall, can permanently dispose of garbage or excess stone set on top. The severed platform will disappear into the darkness below, and never be seen ever again.

=== Garbage dump ===
It may still be possible to chasm refuse as it was in earlier versions. Try designating a garbage dump [[activity zone]] over the chasm. Monsters may also spring from the chasm, and were provoked by the chasming of refuse in previous versions. It is unknown if these events still occur. Given that this technique still works, you can dump anything in your fortress by selecting {{key|k}} and marking items for {{key|d}}umping.

=== Bone supply(?) ===
''Needs confirming - based on older version technique''<br/>
Monsters will spring from the chasm on some occasions. Provoking these attacks and dealing with the monsters on a regular basis makes a nice bone supply. Chasm creatures also present excellent training opportunities for military dwarves.

== Hazards ==

Dwarves 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 [[iron men]], [[giant cave swallow]]s, [[antmen]], [[giant cave spider]]s, and [[ratmen]].

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+Chasms appear similarly to rivers, but are not visible on the Local/Region/World maps.  They are similar to the DFv0.23 chasms except that they are not guaranteed, seem to use the same river-generation code for the fortress map (a "chasm tributary" has been observed), and occupy all depths.
-'''Chasms''' are a feature that appear infrequently in [[mountain]]ous [[biome]]s. They are a [[cave]] system identified by not having a [[floor]] on the lowest level (which is instead marked <tt>#</tt> and described as "Chasm" when loo{{k|k}}ed at).
+Chasms are much more common on named [[mountain]]s and [[volcano]]es, along with other special features such as [[cave river]]s.
-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 [[magma pipe]] without the magma.  Chasms may either be open to the sky, or fully [[underground]] 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 [[announcement]] "'''You have discovered a large chasm cleft through the mountain.'''" or "'''You have discovered a deep pit in the mountain.'''".
+Chasms are possibly the only feature that can create Extreme Cliffs (20+) that may be observed on the Local Map.
-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 [[init.txt]].  They must also be set to be shown during [[advanced world generation|world generation]].  On the local map, standard chasms will show up as {{Tile|#|0:1}} (usually a line of them) and a bottomless pit as {{Tile|○|0:1}}.
+Chasms can also appear in a rounded shape, as below:
-The presence of Extreme [[Cliff]]s (20+) on the Local Map is sometimes indicative of a chasm, though this may be coincidental.{{verify}}
+[[Image:chasm.PNG]]
-==Forms==
+== Uses ==
-===Standard===
+These uses are meant to be used with the lowermost level of the chasm. (Where you can see no lower)
-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 {{Tile|#|0:1}} on the embark map if enabled.
-[[Image:Tributary chasm.JPG|Standard chasm showing lowermost level descending to the depths]]
+=== Platform-chasming ===
+A technique of building a platform over the chasm, and then severing the platform from the wall, can permanently dispose of garbage or excess stone set on top. The severed platform will disappear into the darkness below, and never be seen ever again.
-===<span id="Vent"></span>Bottomless pit===
-:''Note: See [[Pit]] 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 {{Tile|○|0:1}} on the embark map if enabled.
-[[Image:chasm.PNG]]
-==Uses==
 === Garbage dump ===
-Chasms provide a convenient method for permanently disposing of any unwanted items. Simply designate a [[activity zone#Garbage Dump|garbage dump activity zone]] on a walkable tile adjacent to the chasm, then mark your unwanted items for {{key|d}}umping. [[Standing orders]] can be used to automatically dump particular types of refuse. If the chasm is inhabited by [[creatures]], [[dwarves]] may cancel the dump task if the creatures are too close, even if they are technically unreachable.
+It may still be possible to chasm refuse as it was in earlier versions. Try designating a garbage dump [[activity zone]] over the chasm. Monsters may also spring from the chasm, and were provoked by the chasming of refuse in previous versions. It is unknown if these events still occur. Given that this technique still works, you can dump anything in your fortress by selecting {{key|k}} and marking items for {{key|d}}umping.
-Note that placing the garbage dump zone '''inside''' the chasm will cause its inhabitants to become angry when items are thrown in, though the ramifications can be largely dismissed unless the inhabitants have a direct path to the surface (or to the interior of your fortress).
-=== Platform-chasming ===
-A technique of dumping by building a platform over the chasm, and then severing the platform from the [[wall]], to permanently dispose of garbage, excess [[stone]] or [[Unfortunate accident#Sacred pulpit|nobles]] set on top. The severed platform will disappear into the darkness below, never to be seen again.
-===Resources===
+=== Bone supply(?) ===
-Chasms are frequently home to [[cave spider]]s and [[purring maggot]]s, making them a potential source of [[silk]] and [[dwarven milk]]. As the chasm exposes every layer to view, they provide access to easily identified resources such as [[ore]] deposits and [[gem]]s.
+''Needs confirming - based on older version technique''<br/>
+Monsters will spring from the chasm on some occasions. Provoking these attacks and dealing with the monsters on a regular basis makes a nice bone supply. Chasm creatures also present excellent training opportunities for military dwarves.
 == Hazards ==
-[[Dwarves]] 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 [[iron man|iron men]], [[troglodyte]]s, [[giant cave swallow]]s, [[antman|antmen]], [[giant cave spider]]s, [[ratman|ratmen]], [[batman|batmen]], [[troll]]s and [[gremlin]]s.
+Dwarves fighting near the edges of cliffs have a propensity to dodge right off the precipice, falling to their deaths.
-== Adventurers Beware ==
+The chasm is also home to many types of hostile creatures, including [[iron men]], [[giant cave swallow]]s, [[antmen]], [[giant cave spider]]s, and [[ratmen]].
-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 [[fun]]!
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-{{Category|World}}
+[[Category:World]]