What geophysical method is most effective for mapping deeply buried bedrock pediments at a depth of 1500 feet?

Seismic reflection is particularly effective for mapping deeply buried structures such as bedrock pediments at significant depths, including those around 1500 feet. This method relies on measuring the time it takes for seismic waves generated by a source to reflect off various geological interfaces beneath the Earth's surface. By analyzing the reflections, geologists can create detailed images of subsurface geology, allowing for the identification and mapping of bedrock and other strata.

At a depth of 1500 feet, seismic reflection provides a clear advantage because it can penetrate deeper than many other geophysical methods and can generate high-resolution images of subsurface features. This makes it ideal for distinguishing between different geological layers, such as soil, sediment, and bedrock, which is crucial for understanding geological formations and potential resources.

Other methods like magnetic surveying, electrical resistivity, and gravity surveys have limitations when it comes to depth resolution and the ability to clearly resolve subsurface structures at such depths. For example, magnetic surveying is more effective for detecting variations in magnetic minerals and can become less reliable at greater depths. Electrical resistivity methods, while good for mapping shallow features, often struggle to penetrate deeply into the Earth due to the complexities of resistivity variations in different materials. Gravity surveys can provide general insights into