adjective
- resembling or having the characteristics of gneiss; banded or foliated in appearance like gneiss rock
Usage: geology; technical
Examples
- The gneissoid texture of the metamorphic rock indicated it had undergone significant heat and pressure.
- Geologists identified the gneissoid banding in the outcrop as evidence of ancient tectonic activity.
- The gneissoid appearance of the specimen suggested it was a migmatite rather than true gneiss.
- Under the microscope, the gneissoid structure showed alternating light and dark mineral layers.