Jökull


Jökull - 01.12.1985, Page 73

Jökull - 01.12.1985, Page 73
TABLE 1. Thallus diameters of Rhizocarpon geographicum for intermoraine outwash Zones 1 to XXVII. TAFLA 1. Þvermál flétta við Sólheimajökul. % sites Area Zone Max. diameter Mean of 5 largest Mean of 25 largest No. of devoid of (mm) ± SD (mm) ± SD (mm) sites thalli A I 60 46.6± 8.4 29.1±14.2 34 29 A II 91 76.8±13.4 55.2±13.0 42 12 A III 51 48.8± 3.6 33.6± 8.8 21 10 A IV - - - 26 100 A V 73 65.2± 7.1 47.0±10.8 12 17 A VI 43 - - 4 75 B VII 86 74.2±11.7 41,9± 19.8 7 0 B VIII 65 60.9± 2.4 51.7± 6.4 11 9 B IX 85 78.3± 3.9 64.5± 9.0 36 17 B X 66 19.6±26.3 (13.4±21.7)' 14 71 a) 88 80.0± 5.1 70.3± 6.1 22 0 C XI b) 110 77.4±21.4 - 2 0 (Holar)a+b 110 87.8±12.9 73.1± 9.8 24 0 C XII 80 72.8± 5.6 (60.0±12.4)2 3 0 C XIII=T2 93 84.2± 6.9 69.5± 8.8 28 0 C XIV=T3 23 19.8± 2.6 12.2± 5.3 8 0 C XV=T4 9 7.4± 1.3 - 4 0 C XVI 52 - - 1 0 D XVII=T5 11 6.3± 4.0 - 6 33 D XVIII=T3 62 50.4± 7.0 40.3± 7.1 29 0 D XIX 36 33.0± 2.7 - 4 0 D XX 28 19.2± 5.4 - 3 0 D XXI=T5 0 - - 3 100 D XXII 31 18.4± 7.3 - 2 0 D XXIII 0 - - 1 100 D XXIV 23 19.7± 2.2 13.7± 4.7 7 0 D XXV 21 14.6± 4.0 - 5 20 D XXVI=T4 12 11.4± 0.6 7.8± 3.4 5 0 D XXVII=T5 13.5 10.6± 2.5 - 2 0 Total 342 1 20 thalli 2 15 thalli EVIDENCE OF RELATIVE AGE OF SANDUR DEPOSITS (1) Morphological evJdence Four main morphological areas have been identi- fied (A, B, C and D, Fig. 1) (and Maizels, in prep.) Area A lies in the west and forms a high (ca. 65-106 m) sandur deposit, known as the Skógasandur, which comprises 3 main terrace areas (zones, I, II and III) truncated by 3 large flood channels (IV, V and VI). This area has been described by Carswell et al. (1973) as „hummocky sandur“ and represents the highest deposits in the study area. The flood channels include JÖKULL 35. ÁR 71
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