How to Use "chert" with Example Sentences

1. A single pore between chert granules in a rock formation in ontario province , canada , shows off its colors in this photomicrograph .
2. Pure siliceous ooze , a diagenetic environment for early chert formation .
3. Paleontologists know chert as a good place to look for fossils .
4. Bernal heights natural area , a 24-acre knob of red franciscan chert that rises from a sea of colorful row houses like the prow of a ship , has a 360-degree view of san francisco in its pastel glory .