Basalt Deltas

The basalt deltas is a volcanic biome found in the Nether.

Description[]

The basalt deltas is composed largely of basalt and blackstone. Its fog appears in a dull lilac color with ash particles passing by. Archipelagos with islands of different sizes can be found around the lava seas nearby.

Nether fortresses and caves filled with nether quartz ore can also be found here. Ore generates more commonly (to compensate for less netherrack to generate in). Bastion remnants do not generate here.

Basalt deltas are exceedingly dangerous due to their jagged terrain, countless deltas, ghasts and magma cubes. Magma cubes jump from above and are immune to damage from lava. Due to their high spawn rate, they can pose a threat to the player even while wearing netherite armor, but they also make the biome the best place from which to obtain magma cream. Being bumped here is more dangerous than in other biomes, as cliffs and hidden lava pools are common.

In *Java Edition*
Mob	Spawn weight	Group size
Monster category
Ghast^{[note 1]}	⁴⁰⁄₁₄₀	1
Magma Cube	¹⁰⁰⁄₁₄₀	2–5
Creature category
Strider	1	1–2

↑ Only 5% of spawn attempts succeed.

In *Bedrock Edition*
Mob	Spawn weight	Group size
Monster category
Magma Cube	¹⁰⁰⁄₁₄₀	2–5
Ghast	⁴⁰⁄₁₄₀	1
Creature category
Strider	1	2–4

Sounds[]

Music[]

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These music tracks play while the player is in the Basalt Deltas.

Filename in Minecraft	Gameplay	Soundtrack Title	Soundtrack	Weight
nether1.ogg	The Nether	"Concrete Halls"	Minecraft - Volume Beta No. 7	1
nether2.ogg	The Nether	"Dead Voxel"	Minecraft - Volume Beta No. 3	1
nether3.ogg	The Nether	"Warmth"	Minecraft - Volume Beta No. 11	1
nether4.ogg	The Nether	"Ballad of the Cats"	Minecraft - Volume Beta No. 15	1
so_below.ogg	Soul Sand Valley and Basalt Deltas	"So Below"	Minecraft: Nether Update (Original Game Soundtrack) No. 3	7

Ambience[]

Nether ambience plays while the player is in the Nether.


Name	Sound	Group
Basalt Deltas Ambience		Loop
Basalt deltas active 1		Loop Additions
Basalt deltas active 2
Basalt deltas active 3
Basalt deltas active 4
Basalt Deltas Basalt Ground 1
Basalt Deltas Basalt Ground 2
Basalt Deltas Basalt Ground 3
Basalt Deltas Basalt Ground 4
Basalt Deltas Click 1
Basalt Deltas Click 2
Basalt Deltas Click 3
Basalt Deltas Click 4
Basalt Deltas Click 5
Basalt Deltas Click 6
Basalt Deltas Click 7
Basalt Deltas Click 8
Basalt Deltas Debris 1
Basalt Deltas Debris 2
Basalt Deltas Debris 3
Basalt Deltas Heavy Click 1
Basalt Deltas Heavy Click 2
Basalt Deltas Long Debris 1
Basalt Deltas Long Debris 2
Basalt Deltas Plode 1
Basalt Deltas Plode 2
Basalt Deltas Plode 3
Basalt Deltas Twist 1
Basalt Deltas Twist 2
Basalt Deltas Twist 3
Basalt Deltas Twist 4

Data values[]

ID[]

Java Edition:

Name	Identifier	Numeric ID	Translation key
Basalt Deltas	`basalt_deltas`	`173`	`biome.minecraft.basalt_deltas`

Bedrock Edition:

Name	Identifier	Numeric ID
[No displayed name]	`basalt_deltas`	`181`

History[]

Java Edition
1.16	20w15a	Added the basalt deltas.
	20w16a	Increased the number of lava lakes on basalt deltas.
	20w21a	Ancient debris and Nether Gold Ore can now generate.
1.18	21w41a	The water fog color of basalt deltas changes from #423e42 to #050533, though in vanilla nether there's no water.
Bedrock Edition
1.16.0	beta 1.16.0.57	Added basalt deltas.
1.16.100	beta 1.16.100.54	The ceiling of basalt deltas is now made out of basalt, instead of netherrack.

Issues[]

Issues relating to "Basalt Deltas" are maintained on the bug tracker. Report issues there.

Trivia[]

Basalt Deltas biomes never share their border with Crimson Forest biomes.
Basalt Deltas are notable for having the constant, faint sound of a Geiger counter clicking. This is possibly due to the fact that radon gas, which is spewed from volcanoes during eruption, is a highly radioactive element. Given the basalt deltas' volcanic nature with ash particles floating around, one can assume the clicks are meant to imply the biome is a radioactive wasteland.