# Bedrock Geology Field Guide — The rock beneath your boots > The rock beneath your boots (iPhone/iPad app by MARTY RADD ICENOGGLE.) - Source: https://appshunter.io/ios/app/bedrock-geology-field-guide/id6801238052 (this page in markdown: same URL + `.md`) - Developer: [MARTY RADD ICENOGGLE](https://appshunter.io/developer/1889552803) - Category: Education, Reference - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 26.0 · 177 MB - Languages: American English, European Spanish - Released: 2026-10-20 - Data updated: 2026-10-24 ## What is Bedrock Geology Field Guide? 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. ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Bedrock Pro Monthly | $3.99 | per month | | Bedrock Pro Yearly | $19.99 | per year | ## Is Bedrock Geology Field Guide safe? Not enough ratings yet to assess Bedrock Geology Field Guide. ## Is Bedrock Geology Field Guide legit? Bedrock Geology Field Guide appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Bedrock Geology Field Guide is 65 out of 100 points across 7 verification signals from App Store and developer data. ## Version history (last 1 release) ### 1.3 — 2026-10-21 No release notes. ## More apps by MARTY RADD ICENOGGLE - [Montana Field Guide](https://appshunter.io/ios/app/montana-field-guide/id6761426711) - [Flyway Birding](https://appshunter.io/ios/app/flyway-birding/id6761632553) - [NaturalistTripper](https://appshunter.io/ios/app/naturalisttripper/id6761635056) - [Place: Explore the Outdoors](https://appshunter.io/ios/app/place-explore-the-outdoors/id6762151868) - [Missoula Ice Age Floods](https://appshunter.io/ios/app/missoula-ice-age-floods/id6768124055) All apps by MARTY RADD ICENOGGLE: https://appshunter.io/developer/1889552803 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-24.*