The Victorian naturalist . rintlocahty.) The fossiliferous outcrop sampledis on an east bank of the river and isin the form of an overhang. Thebones are contained in a 25 cm thickmedium grained sand to conglomeraticlens. This lens is overlain directly by3 m of very massive, coarsely cross-bedded, medium fine grained, redsandstone. Underlying the lens, inorder of stratigraphic descent, is45 cm of green silty shale, approxi- mately 2 m of red silt and then at least12 m of fissile, deep red, fine siltysandstone. Associated with the bone bearinglens and the green and red silty sedi-ments immediate
The Victorian naturalist . rintlocahty.) The fossiliferous outcrop sampledis on an east bank of the river and isin the form of an overhang. Thebones are contained in a 25 cm thickmedium grained sand to conglomeraticlens. This lens is overlain directly by3 m of very massive, coarsely cross-bedded, medium fine grained, redsandstone. Underlying the lens, inorder of stratigraphic descent, is45 cm of green silty shale, approxi- mately 2 m of red silt and then at least12 m of fissile, deep red, fine siltysandstone. Associated with the bone bearinglens and the green and red silty sedi-ments immediately underlying it, is adegree of secondary copper enrich-ment (predominantly malachite). Inparticular the malachite occasionallylines joints and fractures and fillscores of much of the fossile plantmaterial present. From the reconnaissance mappingconducted so far, it would appearthat the stratigraphic horizon contain-ing the bone material is possibly alateral equivalent of the unit in whichthe footprints were found. Douglas. X Fig. 3: Typical pittedsurface ornamentof the bony pattern(pointed right) onright side of thisplate may be formof growth : N. Archbold 60 Vict. Nat. Vol. 93 (1975) outlined the geology andstratigraphy of the Genoa River Beds. The fossiliferous lens is believed tobe a type of lag deposit. A lagdeposit can accumulate a representa-tive sample of faunal remains presentat the time of deposition. This dis-covery may therefore offer an oppor-tunity to locate remains of earlyamphibians which are known to haveoccupied a similar position as thefossiliferous lens in space and time(Warren and Wakefield, 1972).Geological mapping and sampling ofthe fossiliferous material by studentsof the University of Melbourne iscontinuing in the area. The bone material collected to dateappears to be that of large bonyfishes. It is mostly curved, platey androughly ovoid in shape (from 10 cmto 20 cm in length, up to 10 cm acrossand may be up to 2 cm thi
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Keywords: ., bookcentury1800, bookdec, booksubjectnaturalhistory, bookyear1884
