Abstract
Abstract The sea‐cliffs north of Sydney expose a complex of Triassic palaeosols, pedoliths, and sedimentary rocks. The most obvious and diagnostic features of the palaeosols are fossil roots in place and markedly leached or reddened, relatively massive, clay‐rich strata. Associated coaly layers and fossil plant remains in adjacent sediments show varying degrees of decomposition. The A horizons of some of these palaeosols have been silicified by plant opal and contain abundant insect, earthworm, and larger animal burrows, cradle knolls, and basket podzols. Many of the palaeosols have well‐preserved peds and their upper horizons slake more readily in water than their lower horizons. Their B horizons may consist of extensive layers of siderite nodules or red claystone with tubular grey mottles around old root channels. Less mature palaeosols show some relict sedimentary bedding and ripple marks within their profiles. More mature palaeosols, which appear massive in the field, may show anomalous grainsize vari...
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