The Proceedings of the Eighth International Conference on Creationism (2018)

Whitmore and Garner ◀ The Coconino Sandstone ▶ 2018 ICC 608 Figure 37. This image is looking downward at polygonal “cracks” on a bounding surface (note multiple beds running from left to right) in the Ash Fork area. These features are sometimes referred to as “mud cracks” by some workers (Hill et al. 2016, p. 68). It is important to note that the Coconino is a sandstone with very little clay content, and not a mudstone. These “cracks” often occur on bounding surfaces and extend both upward and downward from the bounding surface. Looking at the rock from the vertical dimension, laminae extend through the “cracks” so the features were never open, as in mud cracks. As far as we know, Leonard Brand (Peters and Brand 1999; personal communication with Brand 2018) has been the only person who has extensively studied these enigmatic features. The photo is about 50 cm wide. JHW photo 3410-2014. Figure 38. Sand-filled cracks that can often be found at the base of the Coconino Sandstone. Also see figure 30. Whitmore and Strom (2010) interpreted these as sand injectites. The Hermit Formation has been weathered away from the sandstone crack fill. New Hance Trail, Grand Canyon. Figure 42 illustrates a larger injectite. JHW photo 5919-2007.