Geologic Expansion
by ItsBlackgear
Geologic Expansion adds a volcanic caldera biome, new stone types, colorful building blocks and a few friendly creatures to the overworld.
What it does
The mod expands the overworld's geology. Its main addition is the Prismatic Caldera, a thermal biome modeled on Yellowstone's caldera. Its prismatic block cycles through stages over time and can be activated by hand with redstone, causing large eruptions. A second new stone, found underground above deepslate, is available in dyed and polished forms, and mossy cobblestone and a vegetation block suited to podzol areas round out the building materials.
Creatures added by the mod swim and fish, and the features can be toggled in the config, so a world can keep only the parts a player wants. Geologic Expansion works on Fabric, Forge, NeoForge and Quilt, and its environment is client and server, so the server and every player need it. Builds cover 1.19.2 – 1.20.1, with 1.0.2 for 1.20.1 as the latest file on all four loaders.
Key features
Prismatic Caldera biome
A thermal biome inspired by Yellowstone's caldera, whose prismatic block erupts once activated by redstone.
Prismatic Stone
Polished stone of a new kind can be dyed, and colorful stairs, slabs and walls are crafted from it for building projects.
Underground stone
A stone type found underground, commonly above deepslate, adding a new layer to cave generation.
Friendly creatures
Small creatures that swim and fish, joining the mod's overworld additions.
Configurable features
Most features can be toggled off in the config, so each world keeps only the parts a player wants.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Building with colorful stone
Dyed and polished Prismatic Stone, with its stairs, slabs and walls, gives builders extra palette options.
Adventure exploration
The caldera biome and underground stone add new places to find while travelling through the overworld.
Who it’s for: Players who want more geology in the overworld, and server owners who want to offer new biomes and building materials, can use the config to keep only the features they need.
Questions
Which loaders does Geologic Expansion support?
Does the server need Geologic Expansion?
Can the new features be turned off?
In the catalog
Geologic Expansion is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 34,764 mods support Minecraft 1.20.1.
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What the author says
Most features can be toggled so if there's something that you wouldn't like in the game you can turn it off in the config.
Official listing
- Modrinth page
- modrinth.com/mod/geologic-expansion
- Owner
- ItsBlackgear
- Published
- 2023-12-10
- Updated on Modrinth
- 2025-01-13
- Facts verified
- 2026-10-15