Abstract
Twelve petrographic variables observed in duplicate thin sections for each of 44 calcarenites collected from the upper 28 m of the Kope Formation and the entire Fairyiew Formation (28.3 m thick) constitute the basis for a time-trend analysis. Each of these variables is indicative to a varying degree of the relative mechanical-energy level at the depositional site. Resultant trend components show low-energy maxima approximately below and above the Kope-Fairview contact, and high-energy maxima below and above this contact. These maxima probably represent small but systematic changes in mechanical energy resulting from small-scale transgressive and regressive events.
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