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Editing 40d:Chasm
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'''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 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 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 | + | 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 are much more common on named mountains and [[volcano]]es, along with other special features such as [[cave river]]s. 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). |
− | 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 | + | 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 gray #s and bottomless pits as gray Os. |
− | The presence of Extreme [[Cliff]]s (20+) on the Local Map is sometimes indicative of a chasm | + | The presence of Extreme [[Cliff]]s (20+) on the Local Map is sometimes indicative of a chasm. (Is this just coincidental?){{verify}} |
==Forms== | ==Forms== | ||
===Standard=== | ===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 {{ | + | 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|#|#777}} on the embark map if enabled. |
[[Image:Tributary chasm.JPG|Standard chasm showing lowermost level descending to the depths]] | [[Image:Tributary chasm.JPG|Standard chasm showing lowermost level descending to the depths]] | ||
===<span id="Vent"></span>Bottomless pit=== | ===<span id="Vent"></span>Bottomless pit=== | ||
− | + | 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|○|#777}} on the embark map if enabled. | |
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− | A bottomless pit, also called a vent chasm, has a similar appearance to a magma pipe, except it does not contain magma. Appears as {{ | ||
[[Image:chasm.PNG]] | [[Image:chasm.PNG]] | ||
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==Uses== | ==Uses== | ||
=== Garbage dump === | === Garbage dump === | ||
− | + | '''Chasming''' [[refuse]] refers to disposing of items marked for dumping into the chasm. | |
+ | This is still possible: designate a [[activity zone#Garbage Dump|garbage dump activity zone]] over the chasm and an adjacent walkable tile. To dump an item, examine it with {{key|k}} and mark it for {{key|d}}umping. [[Standing orders]] can be used to automatically dump particular types of refuse. [[Dwarves]] may cancel the dump task due to [[creatures]] they can see across the chasm, even if those creatures can't reach them {{version|0.27.176.38c}} | ||
− | + | '''Historical note''': In the 2D version, the chasm could spawn monsters, and dumping things into the chasm would provoke attacks. Dumping a sufficient amount magma in the chasm would exterminate them. This no longer occurs in the current version. | |
=== Platform-chasming === | === 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 [[ | + | 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#Walk the plank|nobles]] set on top. The severed platform will disappear into the darkness below, never to be seen again. |
===Resources=== | ===Resources=== | ||
− | + | Often [[cave spider]]s are present near chasms, creating spider [[silk]] webs that can be collected. As the chasm exposes every layer to view they provide access to easily identified resources such as [[ore]] deposits. | |
== Hazards == | == Hazards == | ||
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[[Dwarves]] fighting near the edges of cliffs have a propensity to dodge right off the precipice, falling to their deaths. | [[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. | 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. | ||
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{{World}} | {{World}} | ||
− | + | [[Category:World]] |