(1) Some beds contain carbonaceous fragments, and the remains of large roots are found underlying thick coal beds.(2) This facies commonly occurs associated with carbonaceous shale and laminated sandstone.(3) Sediments at Rick Forester are light gray carbonaceous sandy clays.(4) The association of the cherts with carbonaceous sandstones and lacustrine shales in the Rhynie Cherts Unit indicates sinter deposition interrupted alluvial floodplain sedimentation of mud and sand.(5) An exception may be its type locality in Colombia, where it occurs in veinlets and pockets in carbonaceous sedimentary units apparently distant from igneous rocks.(6) Australian coals and associated carbonaceous sediments may thus well be oil source rocks in the Gippsland basin area and elsewhere in Australia.(7) The apparent increase of carbonaceous macrofossils through the Proterozoic Eon is likely a result of combined biological and environmental evolution.(8) The Anna Shale was then slowly deposited under restricted marine conditions; it is highly carbonaceous and contains vascular plant fragments.(9) An additional sulphide-facies type was described as consisting of pyritic carbonaceous shale.(10) In Proterozoic carbonaceous fossils, ultrastructural and biochemical characters are unavailable, and anatomical and reproductive structures are uncommon.(11) Other fossil seed, leaf, beetle, ostracod, snail and fish remains come from a carbonaceous siltstone that represents a local waterlogged habitat.(12) Silicified carbonaceous schist and graphitic quartzite occur as lenses or layers with extremely variable thickness and are mostly confined to the immediate vicinity of ultramafic rock units.(13) These microfossils, found in bedded carbonaceous cherts, are estimated to be between 3.3 billion to 3.5 billion years old.(14) Cross-bedding, channel-fill structures, red colouration, carbonaceous material, desiccation cracks and raindrop pits indicate that these rocks were deposited in a terrestrial environment.(15) Similarly, there exists the potential for finding ancient samples from Mars or even Venus, as well as unweathered carbonaceous chondrites.(16) It is overlain by the lower shale member, which consists of interbedded carbonaceous shale and lignite that accumulated in coastal marsh and swamps landward of the shoreline.
