. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 136 ANNALS OF THE SOUTH AFRTCAN MUSEUM. FIGURE ?•? Occurrence of roadworthy pedogenic materials in relation to N = 5. Fig. 2. Occurrence of roadworthy pedogenic materials in relation to N = 5. There are of course also exceptions to the latter observation, the isolated occurrence of hardpan calcrete in the Springbok Flats of the central Transvaal, where the present climatic environment has an N-value of less than 5. An exception such as this may, however, be of particular interest, as it may be i
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 136 ANNALS OF THE SOUTH AFRTCAN MUSEUM. FIGURE ?•? Occurrence of roadworthy pedogenic materials in relation to N = 5. Fig. 2. Occurrence of roadworthy pedogenic materials in relation to N = 5. There are of course also exceptions to the latter observation, the isolated occurrence of hardpan calcrete in the Springbok Flats of the central Transvaal, where the present climatic environment has an N-value of less than 5. An exception such as this may, however, be of particular interest, as it may be indicative of the climatic conditions that prevailed in the area during some part of the later Cenozoic and may provide the information necessary for estimating palaeoclimatic conditions of certain localities. The isolated occurrence of large quantities of hardpan calcrete in the Springbok Flats appears to be an outlier of the tongue of hardpan calcrete which stretches south of the Soutpansberg towards Pietersburg. The southern boundary of this hardpan calcrete is about 15 to 20 km north of Pietersburg while in the vicinity of Pietersburg and south to about Potgietersrus only scattered calcrete nodules occur. There is a narrow zone of hardpan calcrete near Potgietersrus, particularly on outcrops of the Transvaal dolomite. That there has ever been a connection between the hardpan calcrete north of Pieters- burg and that in the Springbok Flats can only be assumed but not be proved at this stage. If, however, we consider present-day climate in connection with these calcrete occurrences, two apparent inconsistencies Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
