https://www.terralogosgeo.com/home daily 1.0 2025-04-30 https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1618497259178-6XJGK9GR6YAVBQL5L519/20140301_Trade-151_012-2.jpg Home https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1607694644871-IC85FNH781UNZSZEGHDR/Aro+Ha_0428.jpg Home https://www.terralogosgeo.com/about daily 0.75 2025-04-30 https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/324f12b0-4f02-48b6-989e-2453944e1e8f/IMG_5538.JPG About - Terra=Earth=geo. Logos=Truth. Melding Geology and Geophysics is our specialty. Terralogos Geophysics is owned and operated by Clinton Colwell and was named for his training as a geologist and geophysicist. Clinton Colwell grew up in western Montana and graduated with Honors and a B.S. in Geosciences from the University of Montana. Clint then went on to earn a M.S. in Geophysics from Boise State University. He has performed a wide variety of geophysical work spanning a large range of ecosystems from the Alaskan tundra to the southern Indian Ocean. Clint is versed in the acquisition, processing, interpretation, and reporting of numerous geophysical techniques as seen in our METHODS tab above. At Terralogos Geophysics, helping you is our main goal. We strive to listen to your needs, integrate all available data into our work, and provide quality products on time and in a safe manner. Clint loves to play on big cliffs, climb mountains, hunt wapiti with a bow, ski in the backcountry, pack horses in the woods, whitewater raft, and spend as much time outside as possible when not doing geophysics. https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/095cab0c-59f1-4828-984a-03680cf03f19/IMG_3744.JPG About - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.terralogosgeo.com/contact daily 0.75 2022-01-20 https://www.terralogosgeo.com/gravimetric daily 0.75 2022-01-07 https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/513e3fbe-3528-4f02-a8e1-88f00971adcb/GravityModel.png Gravimetry - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/91624d52-d5b2-4dd4-b9e4-bd96cec72f13/Screen+Shot+2022-01-06+at+11.38.15+AM.png Gravimetry - Gravimetry involves recording discrete measurements of the gravity field over the project area. These measurements allow us investigate subsurface density distributions. We offer full gravimetric services from data collection to processing and interpretation. Gravity methods can be extremely useful for deeper targets when paired with drilling programs. Some Applications: Mineral exploration Void detection Lithology mapping Geologic structural investigations https://www.terralogosgeo.com/gps daily 0.75 2022-01-06 https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/69e9b050-6e25-461c-8054-6210276a41d4/Screen+Shot+2022-01-06+at+11.15.25+AM.png GPS - We use Global Navigation Satellite System (GNSS) devices to accurately locate our surveys so you know where targets are! Without spatial understanding of exactly where identified anomalies are surveys are not of much use, so we deliver properly located results in a wide variety of coordinate systems based on your project needs. Where topography or vegetation make GNSS location more difficult we offer solutions to survey location so you can still know not just what lies beneath, but where it is also! https://www.terralogosgeo.com/magnetometry daily 0.75 2022-01-07 https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/892d807a-9bfb-4014-8348-c278b0d446a0/IMG_3775.JPG Magnetometry - Magnetometry investigates the earth’s magnetic field. Changes in the field give us information about the subsurface distribution of ferrimagnetic materials. Magnetometry offers many advantages including efficiency of data collection, non-invasiveness, and a more affordable way to locate higher resolution surveys. Some Applications: Locating buried metal objects Lithology mapping Mining Environmental resource development Contaminated site investigations Archaeology Landfill delineation https://www.terralogosgeo.com/community-involvement daily 0.75 2022-01-21 https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/1641415912226-A2O1QZECVL13RDOC1UN9/Screen%2BShot%2B2022-01-05%2Bat%2B1.50.46%2BPM.jpg Community Involvement - Inclusive Idaho and Big Brothers Big Sisters of America Clint worked to include people that otherwise would have difficulty in one of his passions- rock climbing. By partnering with a local non-profit, Inclusive Idaho, he has been able to bring exciting experiences to many youth and other people around Boise that otherwise would not have been able to climb! Clint volunteered his time as a Big Brother with Big Brothers Big Sisters of America in an effort to bring some positive influence into young peoples’ lives. https://www.terralogosgeo.com/projects daily 0.75 2024-10-08 https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/26c11e69-d5be-4ed8-8d97-2727d0c3a439/Inversion.png Projects https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/bc0a1e6e-8990-4aa0-9379-36f7c0fcb514/20230830_185846537_iOS.jpg Projects https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/4672c063-ff3a-4df5-9c10-c62c8661983a/Fence5_6.png Projects https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/fdb53acb-851c-45b5-8e96-d2ce8c165f62/IMG_6550.jpg Projects https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/4294a150-fe60-4a70-83d5-6a77b497d7bb/ANCGarageNoInfo.jpg Projects https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/d36753bc-d718-4599-ab87-e41edbbecfa0/Photo+Sep+29%2C+10+20+41.jpg Projects https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/5361f024-35dc-496f-8a8e-748b472df8d1/Photo+Sep+19%2C+11+30+04.jpg Projects https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/673dc489-0633-4ffa-9efb-07856daa4230/Rebar_Utilities.jpg Projects https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/6bbfaffd-0745-4236-b05b-2d14b37e6c1a/IMG_7166.jpg Projects https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/316367f7-9244-48bb-9f7c-62457b90415d/100_2414.jpg Projects https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/d4c7ddb9-4a11-4410-9321-ad4b5a827bba/IMG_7195.jpg Projects https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/eb9b52ca-ad9e-41e8-b6b4-48a859bf80e7/IMG_6146.JPG Projects - Electrical Surveys- minerals Worked in remote northwestern Alaska to collect Direct Current Resistivity and Induced Polarization data with the goal of exploring for mineralized ore bearing skarn deposits. We worked in difficult conditions and terrain to bring valuable information to our client within budget and timeline. https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/67798b24-ec62-4d06-ba71-1ba991632f84/Screen+Shot+2022-01-20+at+1.28.45+PM.png Projects - Geologic Electrical Surveys Worked to identify geologic structure in a complex volcanic landscape. We collected, processed, and interpreted Direct Current Electrical Current Resistivity to determine subsurface resistivity in the shallow subsurface for drilling purposes. https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/dc14423d-1659-43d8-b017-054155e75f64/UtilityExample_1%5B6_188+to+6_438+ft%5D.jpg Projects - Ground penetrating radar Mapped utility and sprinkler pipe locations in a common area located on the University of Montana. https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/03f26733-027f-4552-b5b5-67d2d9076483/IMG_1868.jpg Projects - Magnetic Data collection Collected more than 30 miles of magnetic data across properties with various landownership in western Montana. The purpose of the surveys were to explore geologic structure in the area. Data were processed, modeled, inverted, and interpreted which lead to the discovery of numerous unidentified geologic structures in the area. https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/621deb32-83bf-4f7b-9886-e1359ee36a5d/Screen+Shot+2022-01-20+at+1.48.41+PM.png Projects - Integrated interpretation- Seismic, Magnetic, Gravity methods Collected, processed, and interpreted hammer and vibroseis source seismic, gravity, and magnetic data in Oregon to explore subsurface geology and structure. https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/f44ae792-2cbe-4637-b59a-a69101a290fc/Screen+Shot+2022-01-20+at+2.31.17+PM.png Projects - Gravity modeling Used borehole lithologic information combined with gravimetric data to produce models of the subsurface and gain insight into lateral extent and depth of lithologies and geologic structures for exploration purposes. https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/bacddb7b-68b6-41c1-99d7-b99ecfa802d3/IMG_7558.jpg Projects - Malaysian Airlines Flight 370 Collected Multi-beam Bathymetry and Synthetic-Aperture Side-Scan Sonar in a multi-year attempt at locating the missing Malaysian Airlines Flight MH370. Spent months in the southern Indian Ocean in a variety of conditions including significant wave heights greater than 9 meters. https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/ddaf72d1-ee90-48ac-a3b5-97f08764885f/Screen+Shot+2022-01-20+at+12.47.31+PM.jpg Projects - Marine Seismic Processing Processed and interpreted marine seismic data in offshore western Alaska to explore subsurface conditions for derrick location. Produced time migrated seismic lines over several kilometers of line. https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/090bbf93-40eb-49f2-8c85-282a8a536c61/IMG_3738.JPG Projects https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/ca755a36-3a3f-4a70-ac2a-80a1eee9023e/IMG_3742.JPG Projects https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/7ab005b6-a849-412f-bf99-9ba8de24fc51/IMG_3743.JPG Projects https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/4490b524-8b62-4567-9479-4a6333cdb3b6/IMG_3770.JPG Projects https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/f0982544-f6ab-4d66-a17f-e53cddbe4785/Screen+Shot+2022-01-05+at+4.22.11+PM.png Projects https://www.terralogosgeo.com/gpr daily 0.75 2023-02-24 https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/4702b29e-db25-4e7a-89f9-98b49511783b/IMG_7809.jpg GPR - GPR is a geophysical tool that transmits electromagnetic waves into the surface and records the reflection of that wave off of contrasting electrical properties of buried materials. This technique offers high resolution, rapid imaging, and can provide depth estimates to targets; so it has a huge variety of applications. One of the strengths of GPR is that it can identify non-magnetic targets. From locating inch wide utilities held within concrete to mapping bedrock depth this technique is extremely versatile! Some Applications: Locating metallic and non-metallic buried objects such as utilities (including HDPE/plastic lines), pipes, drums, Engineering applications including void detection, concrete imaging(rebar and PT cable), foundation investigations, and bridge corrosion detection Railroad analysis - railway channel analyses Depth to bedrock and soil layers (stratigraphy) https://www.terralogosgeo.com/metal-detectors daily 0.75 2024-01-22 https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/4455b96e-19a2-4370-b064-86b60f1f15e8/Photo+Aug+30+2023%2C+11+08+37.jpg Metal Detectors - Electromagnetic methods (EM) use electromagnetic induction to map electrical properties of the subsurface. These tools can map both magnetic and non-magnetic metals. Since there is no direct contact with the ground, data collection is quick, and EM is more tolerant of noise sources. We use the Geonics EM61-MK2A detector in our work. Some Applications: Archaeology Landfill mapping Finding buried drums Utility mapping Locating buried debris https://www.terralogosgeo.com/seismic daily 0.75 2024-01-22 https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/76893995-acc1-42c7-b20a-ba781d262dee/MASWExample.png Seismic - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/724cccd2-4616-4d04-8aad-e7cca6f4d935/Photo+Mar+20%2C+11+48+29.jpg Seismic - Seismic methods investigate subsurface elastic properties. We use energy introduced into the subsurface to determine where contrasts in these elastic properties occur and through a series of processing steps are able to glean a number of insights into the subsurface. Seismic imaging offers many advantages when it comes to details of the subsurface, especially deeper targets. https://www.terralogosgeo.com/partners daily 0.75 2022-01-04 https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/552eea05-42af-4ab7-816d-46d14f95c0b1/100_1954.jpg Partners - We are partnered with Logic Geophysics and Analytics of Alaska to broaden our skillset and help you get the answers you need. Sometimes your project might fall outside of our specialties, in that case, Terralogos wanted to make sure we could still provide you with some valuable information! Our partner specializes in remote and difficult projects that span the globe from Alaska to Antarctica and has expertise in a broad range of geophysical methods. Logic Geophysics Expertise: GPR, EM Methods, Seismic, Remote difficult projects https://www.terralogosgeo.com/conductivity daily 0.75 2024-01-22 https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/f0982544-f6ab-4d66-a17f-e53cddbe4785/Screen+Shot+2022-01-05+at+4.22.11+PM.png Conductivity - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/61c2461c1ac49e3398d7179f/00aa6a67-079c-4034-8007-7bc038acce0d/Photo+Aug+03+2023%2C+16+52+07.jpg Conductivity - The measurement of ground conductivity includes numerous geophysical techniques. While approaching this same problem in different ways, all share the common goal of discerning subsurface conductivity distribution both laterally and vertically. Which method is best for your project depends on a multitude of factors, which we would be glad to talk with you about! Ground conductivity can be useful for identifying contaminant plumes, source zones, clay layers, bedrock topography, water table depth, mineralization, geologic structure, and many more.