In Prehistoric Farm on Roblox, fossil excavation forms the backbone of the entire gameplay loop. Developed by Project Mirvy, this simulation and tycoon game tasks players with sailing across geological period islands, unearthing ancient specimens, and assembling matching fossil sets. Once completed, these sets are brought to Dr. Ivy's DNA Lab on the Home Island to be restored into dinosaur eggs, which can then be incubated, hatched, and raised into rideable companions.
Understanding how fossil sets are structured, where specific pieces are buried, and what equipment is needed to excavate them will save hours of sailing and tool grinding.
How Digging and Fossil Sets Work
Excavation begins by locating marked dig spots on the various islands. The core digging interaction is a timed skill check:
- Approach a dig mound with a shovel equipped.
- Hold down the interaction key or button to start the meter.
- Release the input when the moving indicator aligns with the green zone.
A well-timed release results in a "Perfect" excavation, which improves your chances of finding quality rewards. Each dig resolves randomly into one of four possible outcomes:
- A named fossil piece: Added directly to your collection toward a specific creature's set.
- No fossil: An empty dig where no specimen is uncovered. Empty digs are common and part of standard gameplay rather than a glitch.
- Coins and Buried Treasure: Direct cash rewards that fund tool upgrades and ranch supplies.
- Nighttime Glowing Dig Sites: After dark, glowing dig mounds appear across the islands. Excavating these night spots can award extra cash bonuses alongside standard fossil drops.
Fossil Set Structure and Geological Periods
The in-game collection menu tracks 80 total slots distributed across six prehistoric categories. It is important to distinguish the total species count of a period from the individual fossil pieces needed for a single egg:
| Geological Period / Zone | Total Collection Slots | Documented Pieces per Set | Known Documented Creatures |
|---|---|---|---|
| Cambrian Period | 6 creatures | 5 fossils per creature | Hallucigenia, Pikaia, Opabinia, Trilobites, Nectocaris (Namocaris) |
| Devonian Period | 8 creatures | Varies by species | Tiktaalik, Ichthyostega, Hyneria |
| Triassic Period | 20 creatures | 3 fossils per creature | Saturnalia, early sauropods, Plateosaurus |
| Jurassic Period | 20 creatures | Unconfirmed | Small theropods, Jurassic carnivores |
| Cretaceous Period | 20 creatures | Unconfirmed | Cretaceous dinosaurs |
| Cretaceous Seas | 6 entries | Special (Fishing) | Sea reptiles |
A common mistake among newer players is confusing the period slot totals with set requirements. For example, seeing "3 out of 6" on the Cambrian interface indicates progress toward unlocking the six creatures of that period. To restore a specific animal like a Hallucigenia, you must collect five matching Hallucigenia fossils rather than five mixed Cambrian pieces.
Furthermore, the six entries listed under Cretaceous Seas do not come from mainland island dig mounds. According to community documentation, Cretaceous Seas entries consist of rare eggs acquired through open-sea fishing and marine activities rather than standard shovel excavation.
Equipment Gates: Shovels and Boats
You cannot immediately dig up every fossil in the game. Progression across the periods is gated by your shovel tier and the boat you use to travel between islands.
Shovel Tiers
Using an under-leveled shovel on a later island will prompt the message "I need a better shovel." Community wikis and recorded player tests document the following tool progression:
- Wooden Shovel (Starter): Free tool provided at spawn. Restricted to Cambrian-area dig sites. Provides 1.00x Fossil Luck and 1.00x coin earnings.
- Bronze Shovel: Costs 2,500 coins at the Home Island tool shop. Unlocks excavation on Devonian Island and grants 1.05x Luck and coin multipliers.
- Silver Shovel: Required to excavate Triassic Island sites. Offers 1.10x Luck and coin boosts.
- Iron Shovel: Unlocks Jurassic Island dig spots. Provides 1.20x Fossil Luck and 1.15x coins (wiki-documented at 50,000 coins, though recorded launch playthroughs observed intermediate shop tiers at 12,000 coins).
- Titanium Shovel: Unlocks Cretaceous dig sites, offering 1.40x Fossil Luck and a 1.30x coin multiplier.
Boats and Sea Travel
Reaching distant period islands requires a reliable vessel. While the starter Dinghy carries two players at 12 knots, newer islands demand longer voyages:
- Dinghy (Starter): 2 seats, 12 kn top speed, 88% handling.
- Banks Dory: Costs 4,000 coins. Offers 3 seats, 14 kn top speed, and 76% handling.
- Console Skiff: Costs 60,000 coins. Offers 4 seats, 29 kn top speed, and 96% handling.
- Lobster Boat: Costs 300,000 coins. Offers 6 seats, 37 kn top speed, and 73% handling.
Players who have raised an aquatic dinosaur can also use it as a sea mount, bypassing the need for immediate boat upgrades when traveling across open waters.
Trading Fossil Sets at Dr. Ivy's DNA Lab
Once you have excavated all required fossil fragments for a creature, your collection UI will update to indicate that the set is "Ready to extract DNA." Fossils cannot be processed at dig sites; you must sail back to the Home Island to finalize the exchange.
- Return to Spawn: Dock your boat on the Home Island and locate Dr. Ivy's DNA Lab, situated near your ranch and the waterfall.
- Interact with Dr. Ivy: Speak with Dr. Ivy, who greets you with, "I'm Dr. Ivy. I bring fossils back to life. Got any samples for me?"
- Exchange the Set: Select the prompt "Trade fossils for an egg." The matching fossil set is consumed, and a species-specific dinosaur egg is generated.
- Incubate the Egg: Place the egg inside an unlocked incubator slot at the lab. A visible countdown timer will begin immediately.
- Collect at the Hatchery: When the timer reaches zero, walk to the Hatchery station to retrieve your newborn creature, then place it inside your ranch pen.
Observed incubation timers vary based on species and rarity. Recorded gameplay shows a Hallucigenia egg requiring roughly 5 minutes, while an Uncommon Tiktaalik egg required 2 minutes and 30 seconds. Community listings report baseline incubation intervals scaling from 1 minute for Common eggs up to 20 minutes for Legendary specimens.
After placing the hatchling on your ranch, you must maintain its Belly meter above 50% by feeding it compatible meat, fish, or crops. Sustained feeding allows the animal to grow through its life stages (Newborn, Juvenile, Subadult, Adult, and Elder). Fully grown Adult and Elder dinosaurs can then be mounted and ridden across the islands.
Frequently Asked Questions
Can I mix different fossils to get a dinosaur egg?
No. An egg requires a complete matching set for one specific prehistoric animal. For example, five Cambrian fossils from different species will not trigger DNA extraction; you need five matching pieces belonging to the exact creature you wish to restore.
Where are Cretaceous Seas fossils found?
Cretaceous Seas creatures are not unearthed through shovel dig sites. Official descriptions and wiki logs confirm that Cretaceous Seas entries represent rare eggs and catches obtained through open-sea fishing activities.
Do I lose extra fossils when I trade for an egg?
Community wiki data recommends checking your live collection count immediately after trading. Surplus pieces for uncompleted creatures remain in your collection, but you should verify your inventory before planning your next exchange rather than assuming overflow pieces transfer.
What should I do while waiting for eggs to incubate?
Incubation does not require you to remain inside the DNA Lab. Players commonly spend incubation countdowns fishing at the nearby docks to earn extra coins or gathering food for their existing dinosaurs.
