504 G. A. Lebour, and W. Mundle — Coal in Chile. 



Ft. In. 



4. Next is another band of Calcareous sandstone, very fine-grained and hard 6 



5. A light bluish-grey argillaceous sandstone 6 



6. Coal, hard and good, but containing Iron pyrites, and in some parts small 



nodules. These nodules contain many plant-remains (monocotyledons), 



and some reptilian-remains. This is the highest coal-seam in the district 2 6 



7. A thin band of dark -brown bituminous clay, greasy to the touch, and full 



of vegetable debris, filling the place of a true under-clay . . .06 



8. A soft whitish clay, which passes gradually in its lower part into a fine- 



grained grey argillaceous sandstone, resembling the upper beds already 

 mentioned, but containing a small quantity of lime 26 



9. We now come to the Second Coal. This seam is good and clean, but soft, 



and leaves much ash in burning 2 



10. A light-grey argillaceous sandstone 5 6 



11. The Third Coal-sesLm, six inches of which are taken by a band of brown 



micaceous shale, which divides it in the middle 2 11 



12. A fine grey arenaceous shale, in the upper part compact and hard, with a 



great quantity of vegetable remains, which give a streaked appearance 

 to the rock ; and at the base, a dark -brownish, indurated clay, speckled 

 with black round spots, the centre of each of which is formed by a car- 

 bonized stem 8 



13. A thin band of black bituminous shale, scared with shining Coal. This 



is combustible, and after burning, is perfectly white, but it is unavailable 



for practical purposes , 9 



14. A brownish indurated clay, similar to No. 12, but without spots and stems 3 7 



15. A whitish argillaceous sandstone, containing, in the upper part, many 



remains of ferns and trunks of trees. A thin band of shale intersects 

 this bed, in which are numerous veins of Hsematite and Carbonate of 

 Lime. The sandstone gets coarser in its lower part . . . . 20 



16. A dark-grey shale, with carbonized remains of plants . . . . 15 10 



17. A brownish clay, micaceous, and containing in parts concretionary nodules 



of a pure green clay 5 3 



18. A hard grey shale, rough to the touch, with black spots in parts, and with 



a conchoidal fracture 4 



19. A white crystalline sandstone, containing (as indeed most of the grits 



enumerated in this section do) disseminated grains of Hornblende . 5 5 



20. Alternating beds of argillaceous and calcareous sandstones, the latter 



being the thinner, and the former containing vegetable remains, 

 especially in the upper parts 20 



21. A band of black bituminous shale 2 



22. The Fourth C'oaZ-seam ; an unimportant one, very friable, and with 



partings of white Dolomite and Gypsum 7 



23. Black bituminous shales (in which vegetable remains become rarer 



towards the base), passing into a light-grey indurated clay, with car- 

 bonized plants, forming confused masses, which, with several included 

 bands, (in most of which are impressions of leaves, etc.,) is distinctly 

 divisible into nine difierent beds 14 



24. The Fifth Coal, good, hard, and clean, with pyrites in places. This is a 



workable seam. The floor of this coal is formed of a dark-brown bitumi- 

 nous slate clay, in all respects similar to the Under-clay of the First 

 Seam (No. 6), and only a few inches thick 3 3 



25. A brownish-grey shale, very micaceous, with some impressions of leaves, 



and with Dolomite partings 66 



26. A fine-grained hard calcareous grit . 6 



27. A spotted arenaceous shale, with scares of coal 6 4 



28. The Sixth Coal, divided into two seams, by one foot seven inches of grey 



bituminous shale, with remains of plants. The upper bed of coal is of 



good quality, but the lower one is earthy and bad , . . . .25 



29. The Under-clay to this seam is a black bituminous shale, scared with coal 1 4 



30. A blackish-grey Sandstone, streaked with whitish lines . . . .39 



31. The Seventh Coal, good, and very clean 7 



32. A black bituminous shale .......... 1 4 



33. The Eighth Coal-se&va. This is the most important of the district, and 



consists of a very good, hard, and clean coal. This is, of course, the 

 chiefly-worked seam ..,..<, ...49 



34. Its Under-clay is a dark-brown bituminous shale 14 



35. A grey indurated clay, in parts compact and hard, in others soft and 



plastic 4 



36. A grey arenaceous shale, well stratified, very fine grained, with the grains 



