Sentence Examples

  • (2) More common are the auriferous quartz-reefs - veins or masses of quartz containing gold in flakes visible to the naked eye, or so finely divided as to be invisible.
  • The Rand reefs, first mined in 1886, cover a large area.
  • They are apparently volcanic. Coral reefs lie off the coasts and render them difficult of access.
  • The formation is noted for its regularity as regards both the thickness and the gold-tenor of the ore-bearing reefs, in which respect it is unparalleled in the geology of the auriferous formations.
  • It is surrounded by coral reefs, and is richly wooded.

Words near reefs in the dictionary