Cleveland’s Matterhorn looking splendid in the first rays of a winter sun. Its sandstone cap, laid down in a river delta 168 to 176 million years ago and subjected to enormous pressures, lies on top of soft, easily eroded shales of what the geologists refer to as the Whitby Mudstone Formation and corresponding to the slopes of dead bracken. Between the two strata lies the thin Roseberry Plant Bed containing fossils of Jurassic tree ferns; one of the reasons why Roseberry has been designated a SSSI. Lower down the slope, the grass pasture grows on the older Cleveland Ironstone Formation.


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