Alex’s Caves / Biome 2/6

Primordial Caves

A subterranean prehistoric ecosystem of enormous limestone chambers, ancient vegetation and dinosaurs. Amber formations illuminate the caverns and create a striking contrast to normal mining.

Biome ID
alexscaves:primordial_caves
Where it forms
Underground Overworld

What makes this cave different

A subterranean prehistoric ecosystem of enormous limestone chambers, ancient vegetation and dinosaurs. Amber formations illuminate the caverns and create a striking contrast to normal mining.

What to look for

Explore ancient trees, ferns, amber and prehistoric fauna. The biome uses the Dino Bowl generation structure and contains distinctive ancient-world locations.

How to prepare

Bright light does not guarantee safety. Observe large creatures before approaching, carry provisions and inventory space, and plan a retreat across exposed ground.

Resources and rewards

Amber, limestone, Ambersol and prehistoric ecosystem resources.

How do I find this particular biome?

Use a matching Cave Tablet to create a Cave Codex and Cave Biome Map. The map targets a specific biome type, but discovery depends on your world and settings.

Other cave biomes

Illustration: magnetic caves

Magnetic Caves

Neodymium, galena and materials for magnetic equipment and mechanics.

Read guide →
Illustration: toxic caves

Toxic Caves

Radioactive materials, hazardous-zone resources and abandoned-structure loot.

Read guide →
Illustration: abyssal chasm

Abyssal Chasm

Deep-sea materials, ruin artefacts and unusual underwater items.

Read guide →

Finding your way

Finding rare caves

Cave Tablets → Cave Biome Map

Read guide →

Original mod documentation: https://alexscaves.wiki.gg/wiki/Primordial_Caves