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12 - - The soils are Calcic cambisols or Eutric fluviaole. The land uses are arable and woodland. The natural vegetation is Memomediterranean with berm8 izex and Thermomediterranean. There is a high population density, with two industrial and urban centres in the Ebro valley and in Valencia. Land Class 11 Pyrenees Mountains This Land Clans is located in the north-east of Spain and is characterised by the Pyrenean mountains. It is altitudinally the highest Land Class and the geology is mainly Tertiary and Seconduy but with some rocks of other geological periods. The indicator attributes are: - Low altitude 1500-2000 m. (ie indicative of high altitude) - Medium-low Jurassic The soils are quite varied, but are mainly Rnukers, Litosols and Calcic cambinols. The land we8 are roodland and rough gruing, The natural vegetation in a vegetation-capler rhich i8 oh.rrot.ri.tit . of this side of Pyren- and IbericQromediterrauenm. Thts Laad Clue hnn - a lor populatioo~dslt.ttty and.na urbm .and .induotrial + centre. ore present, Land Class 12 Cmtabrian Ranm This Laad Clans is located in the Northern Cantnbriam Morurhixu vfhiah mepuate the northern comt and. the '(IPW. plrteaux.. Tha bdhmk0~. attributes are: - -- Media-la tampo- in July - Medium-la rainfall In J.p~yl) - Medium-high Jurusio geology - Medium-3- temperature. in March -- The .oilr ore Calcte wabholrl Eanbtd. .ILbBnrircmbiroL The nrM- vegefsMoxe ie Atlantie mb-- SUP- Tho popl1ntiOm i r higbrrirr thw cnrC-nlkr* w&tb - urban* and. I-. cen*rea. - Land Clus~13 soU--plr+u, This L.ad-Clr&-tt-.tttmto& an thb.--pl.h.ai Tho -Wewith height is 600 mtrelr, GeologicrllJ. it ii a . e= Tort* -, 'Q, 1. Con- *+tLthPtpr Uo:
- Medium-high temperature in March - Aigh temperature in July - Low slope angles The soils are Eutric cambisole, Eutric fluvisols and Vertic luvisols. The main land use is arable. The natural vegetation is Mesomediterranean with Quercus suber and Quercus iZex. This Land Class is not heavily populated and is concentrated in only one town: Madrid. Land Class 14 Northern Plateaux This ~ 4 Class d occupies the northern plateaux and the north side of the southern Plateaux. It is different from clam 13 in that it has a higher median elevation. The indicator attributes are: - Medium low temperature in Much - High Quaternary geology - Medium high distance from the mouth coamt The soils are Calcic ~ ubiSOl~ and Gleyic crmbisola. The land ume ia arable. The natural vesetation is Mesorcntiterramm~~ with $cercua itex and Supramediterraneur. There is lor population W i t y conosnfmated in nadiu ciao t-. Lad Clms 15 Siliceous higher mountains Thia Lad Class occurs in two areas, 1.0. the western extreme of the Cantabrian range and the central range. Geologically, these are old mouatallu with acid rocks. The indicator attributes are: - Medium-high elevation betmoa 1000-1500 m.. - Lor PrecaBbrfc geology - Lor Silurian geology The soils are Wit csmbimolm, Rankem and Diatrfc cambimols. The lam3 uao im modland and rough gruing. The naOOrrL vegotatfon-io Atlprti~euntwm~~~~witb- Qmrczas ptlnmuihtz; Both areas-hove a very l w popu1atl011 6enaity. Land Clamm 16 Silicsorrrr~nai.n'IDIIILt.fm - Thia Land Clue is located geogrcph%cally .d.t of th. .+rr of LPnd Clus 15. Ite aversgo 8ltltnde fr 1011~-th.a Lurd Cluo- W,.
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Page 3: PREFACE 1 The study demonstrates th
Page 6: 3 Geology: the International Geolog
Page 11 and 12: program to the data base was a new
Page 13 and 14: Land Class 3 Median Atlantic and Aa
Page 15: Land Class 8 Northern Portugal This
Page 20 and 21: If different cut-off points are cho
Page 22 and 23: P A& I"------------n. .** s. * . O
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Page 27 and 28: ' 1 1 alves attributes ... 1 : . 2
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Page 33 and 34: Figure 18. Second RAO axis values.
Page 35 and 36: The theoretical differences between
Page 37 and 38: 2. The reduction in the quantity of

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