Bedrock Geology Field Guide
The rock beneath your boots
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Tap any point and find out what you're standing on — the unit, its age, its rock, the column beneath — and 3,000 of North America's geological sites on one layer.
Tap anywhere. Find out what you're standing on.
Bedrock turns your phone into a field geologist's reference library and notebook. Tap any point on the map and it assembles what public science knows about that spot: the mapped bedrock unit, its age, what it's made of, the stratigraphic column beneath you, nearby faults and volcanoes, fossils found in those rocks, water, terrain and hazard indicators.
Then it explains the place in plain language, technical language, wonder, or as if you were twelve. Your choice.
WHAT YOU CAN DO
• Inspect any point — mapped unit, age, lithology, and the column underneath
• Geological sites — the 3,000 best-known geological places in North America on one layer, Niagara to the Chicxulub crater, each with its write-up
• Hot springs, geysers, arches, canyons, falls, glaciers, cones and craters — every one the USGS names, on the map and on the card
• Explain This Place — four voices: Plain, Technical, Wonder, ELI12
• Deep Time — scrub back a thousand million years and watch the continents move
• Read Aloud — one huge screen that reads the ground aloud, built for sun and gloves
• Cross-section — two taps draw the ground's profile, the units beneath it and every contact, dipped from your own readings
• Photograph a rock — on-device classification, with an optional AI second opinion on your own OpenAI key
• Rock-ID key — walk a dichotomous key the way you would in a lab
• Field Book — strike & dip with an equal-area stereonet, sketches, hardness tests, registered samples, traverses, stratigraphic columns, and rock classifications (QAPF, Folk, Dunham, metamorphic facies)
• Observations — every Field Book entry with a coordinate, pinned on the geology map
• Export — GeoJSON, GPX, KML and CSV, for QGIS or ArcGIS
• Offline — download basemaps and geology for an area before you lose signal
• Apple Watch — strike & dip readings, quick observations, voice memos
• Widgets — the nearest mapped unit, and days since your last field day
IF YOU'VE NEVER DONE THIS BEFORE
• Take the guided tour — Bedrock drives itself through a real inspection and explains each card as the live data lands
• Searchable "how do I…" help, and a plain-language glossary of every geology term, tappable wherever it appears
WHERE THE DATA COMES FROM
Bedrock paraphrases public scientific datasets and names its sources on every screen: Macrostrat for bedrock units and columns; USGS for landslides, hydrography, faults, minerals, springs and landforms; FEMA for flood zones; the Paleobiology Database for fossils; GPlates for paleogeography; the Smithsonian Global Volcanism Program; Wikidata for the geological sites; GLIMS and RGI for glaciers.
Every card tells you whether what you're reading is mapped, estimated, or written by AI from supplied data. Confidence is stated, not implied.
WHAT IT IS NOT
Bedrock is not a geologic map, not a hazard assessment, and not a substitute for your own eyes. A geologic map is drawn at a scale where a whole neighborhood can be one color — the map can be right and the outcrop in front of you still different. Treat the map as the hypothesis and the rock as the answer.
Do not use Bedrock for safety-critical decisions.
FREE, AND BEDROCK PRO
Free is enough to work with: the whole map, point inspection, and written explanations built on device from the mapped data — unlimited, with no signal. AI-written text runs on an OpenAI API key you add in Settings; Bedrock ships none, and OpenAI bills that usage to you. Each month brings 3 cross-sections, 3 deep-time reconstructions, 15 Rock-ID key walks and 15 exports, plus a Field Book of 15 entries and 3 offline areas.
Bedrock Pro lifts every limit and adds your own map layers, published trips, bed detail, proximity alerts and the Apple Watch app. $3.99 a month or $19.99 a year, with a 7-day free trial on the annual plan.
Terms of Use (EULA): https://nature-tools.com/bedrock-terms/
Privacy Policy: https://nature-tools.com/bedrock-privacy/
Requires iOS 26.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, MARTY RADD ICENOGGLE, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- User Content
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- MARTY RADD ICENOGGLE
- Size
- 185.7 MB
- Category
- Education
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later. - Apple Watch
Requires watchOS 26.0 or later.
- iPhone
- Languages
- English and Spanish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Bedrock Pro Yearly $19.99
- Bedrock Pro Monthly $3.99
- Copyright
- © 2026 Nature Tools