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You are here: Home / Archives for Newsletter Archive

October 2020 Newsletter:
Supplemental Tools for Geophysics – How We Present the Results

In past newsletters we have provided a variety of geophysical case study examples that Pyramid has completed over the years. These projects have showcased methods such as electrical resistivity, seismic testing, electromagnetics and ground penetrating radar that were used to investigate the … [Read more...]

Filed Under: Newsletter Archive Tagged With: 3D geophysics, Electrical Resistivity, electromagnetics, EM31, EM61, Geophysics, GPR, ground penetrating radar, seismic

July 2020 Newsletter:
Density Anomalies and Geophysics – Concepts and Methods

ERT transect with karst

In general, the density of the earth increases with depth, from a lighter silicic crust (or basalt in the oceans) to a sequence of denser, more metallic rocks from the mantle to the inner core. This is what we expect when digging or drilling into the earth. But occasionally we are surprised by the … [Read more...]

Filed Under: Newsletter Archive Tagged With: drilling hazard, Electrical Resistivity, Geophysics, GPR, ground penetrating radar, karst, MASW, oil field hazard, seismic, sinkhole, top of rock

January 2020 Newsletter:
More interesting information about bedrock fractures and how to analyze them

Groundwater hydrogeology can be a challenging subject, even when water flows through a fairly homogeneous medium of grains with interconnected flow paths, but when water moves down via gravity through various strata at some point it typically reaches a level beneath the earth where the rock is … [Read more...]

Filed Under: Newsletter Archive Tagged With: acoustic televiewer, downhole geophysics, Electrical Resistivity, geophysical logging, Groundwater, hydrogeology, MASW, optical televiewer

October 2019 Newsletter:
Seismic Geophysical Surveys to Examine Bedrock Depth and Integrity

MASW Cross Section

The Triassic Basin soil and rock formations in the Durham, North Carolina, region provide challenges for geotechnical design and construction. These formations consist of highly heterogenous stratigraphy including sands, silts and clays overlying a weathered rock unit that can contain boulders, … [Read more...]

Filed Under: Newsletter Archive Tagged With: Geophysics, MASW, north carolina geophysics, seismic, shear wave, top of rock

June 2019 Newsletter:
How the Roads that lead to Rome were made

There is a considerable amount of road building, repairing and widening happening in North Carolina, and I am always fascinated by the way these roads come together in a way that is hard to imagine when the projects are begun. Our roads are built to last and be a safe way for us to get around. I … [Read more...]

Filed Under: Newsletter Archive

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Recent Articles

  • October 2020 Newsletter:
    Supplemental Tools for Geophysics – How We Present the Results
  • July 2020 Newsletter:
    Density Anomalies and Geophysics – Concepts and Methods
  • January 2020 Newsletter:
    More interesting information about bedrock fractures and how to analyze them
  • October 2019 Newsletter:
    Seismic Geophysical Surveys to Examine Bedrock Depth and Integrity
  • June 2019 Newsletter:
    How the Roads that lead to Rome were made

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