I noticed that the quartz grains in the rock had unusual planar deformation features that indicated either it had been exposed to extreme tectonic pressure or a large asteroid impact," the Courier Mail quotes Uysal as saying.
What does PDF stand for?
PDF stands for Planar Deformation Feature (geoscience)
This definition appears somewhat frequently and is found in the following Acronym Finder categories:
- Science, medicine, engineering, etc.
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Samples in periodicals archive:
Shock effects are also present throughout the sample in the form of undulose extinction, irregular and planar fractures, slight mosaic patterns, and planar deformation features in orthopyroxene.