Sandstones or other sedimentary strata colored red by hematite coating the grains.
- ‘Similar thrust ridges bring tilted Neogene red beds to the surface near the northern margin of the Adak valley and indicate that the valley is being overthrust on both its north and south sides.’
- ‘These rocks developed as typical red beds, and dip 10-18° towards the west (264° of azimuth of dip calculated from seismic data).’
- ‘These gaps are commonly associated with red beds in which any organic matter present at the time of deposition has been oxidized.’
- ‘It is recognized that red beds are not necessarily indicators of arid climates.’
- ‘Their composition suggests that they represent metamorphosed red beds.’
We take a look at several popular, though confusing, punctuation marks.