Alaskan Rock Petrographic Thin Sections With Description Cards

Alaska is the geographic scope for this collection of 30,000 petrographic thin sections made from rock samples. The U.S. Geological Survey (USGS) field geologists in Anchorage gathered the materials. Many sections have corresponding descriptive cards.

Use Cases

• Classify rock types using petrographic thin section images and associated description cards.
• Analyze mineral composition and texture features visible in the thin section images.
• Correlate geological sample locations in Alaska with petrographic descriptions from the cards.
• Train image segmentation models to identify mineral grains within the 30,000 thin section images.

Strengths

• Collection contains 30,000 thin sections, providing a substantial sample base.
• Many sections are paired with descriptive cards, offering multimodal data (image and text).
• Samples were collected by authoritative USGS field geologists.

Limitations

• Physical access is restricted to on-site use for non-USGS employees, limiting usability.
• The exact number of sections with corresponding description cards is unspecified.
• Sample data, file formats, and digital availability are unknown.

Provenance

Source

U.S. Geological Survey (USGS), Anchorage.

Collection Method

Rock samples collected by USGS field geologists, processed into petrographic thin sections.

Geography

Alaska, United States.