Abstract
A Graphic Method For Depicting Horizontal Direction Data On Vertical Outcrop Photographs
Highlights
Sedimentary strata and bedforms are three-dimensional objects, the geometric analysis of which requires the collection of data pertaining to the dip of depositional surfaces
Accurate recognition of the dip direction of sedimentary surfaces is important for visualizing stratal forms expressed in vertical rock outcrop
The relationship between depositional forms and their appearance at outcrop, can be readily understood by any geologist who has collected such data, disseminating such observations and interpretations in a visual format is challenging. Photographs render these three-dimensional forms in two-dimensions, so if dip direction data are to be shown in conjunction with the image of an outcrop, they too must be rendered in two dimensions
Summary
Sedimentary strata and bedforms are three-dimensional objects, the geometric analysis of which requires the collection of data pertaining to the dip of depositional surfaces. Additional complications with this method arise because the technique has not been adopted universally: there are numerous instances where apparently similar arrows or rose diagrams on panels or photographs are shown which are oriented relative to north rather than outcrop strike (e.g., Mountney and Jagger 2004; Batezelli 2017) (Fig. 1B) This variant of the technique permits instant comparison between directional arrows on a photograph but is less satisfactory for relating them directly to the image, because it requires mental rotation of the presented data, even before it is visualized as tilted back into the outcrop (there are published instances where this is not even possible, as the orientation of the outcrop photograph is not reported). Neither of these techniques readily promote three-dimensional visualization of stratal geometry from an outcrop image
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
