Transactions - Leeds Geological Association, Part 5 (Google eBook)

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Leeds Geological Association, 1890
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Page 28 - ... of the other bones from the teeth. Thus, commencing our investigation by a careful survey of any one bone by itself, a person who is sufficiently master of the laws of organic structure, may, as it were, reconstruct the whole animal to which that bone had belonged.
Page 12 - ... Madeira Sir C. Lyell has described red partings of laterite or red ochreous clay between sheets of basalt. " These red bands vary in thickness from a few inches to two or three feet, and consist sometimes of layers of tuff, sometimes of ancient soils derived from decomposed lava, both of them burnt to a brick-red colour, and altered by the contact of melted matter which has flowed over them."* Similar intercalations of red earth, which also probably represent old land surfaces, occur among the...
Page 57 - B. Rough stony gravel, with sand... about 9 feet. C. Yellow sand, with | about stony layers {5 feet. D. Hard gray clay, forming floor of pit A British burial found in this layer, on the west side of the pit. Contains pebbles of flint, sandstone, red chalk, Oolitic limestone, and other local rocks, along with a few well-worn erratic pebbles of felstone, quartzite, &c. ; also rolled lumps of clay and streaks of carbonaceous matter like decayed vegetation. The mammoth's tusk and other bones were found...
Page 47 - It is a volcanic breccia, but not an ash or tuff, the peculiar structure being apparently due to the successive paroxysmal eruptions.
Page 49 - This delicate iridescent gem has been known by the name it now bears from the time of Pliny. There is in it the gentler fire of the ruby, the brilliant purple of the amethyst, and the sea-green of the emerald, all shining together.
Page 4 - It was expected that he would have taken a very active part in the next meeting of the British Association, which is to be held in Leeds, and his loss will, on that occasion, be much felt.
Page 47 - ... abundant than elsewhere in North America. At all the localities mentioned chromic and titanic iron ore occur in the diamond-bearing sand, and both of these minerals are characteristic constituents of serpentine. All the facts thus far collected indicate serpentine, in the form of a decomposed eruptive peridotite, as the original matrix of the diamond.
Page 76 - That the trap on the south side of the valley descends among the strata in the form of a great wedge, which diminishes in thickness from thirty or forty fathoms to about twelve feet.
Page 49 - There is no colour so pleasing to the eye as that of the emerald. Whoever delights in the verdure of herb and leaf must enjoy infinitely more the contemplation of emeralds, for no verdure can compare to theirs.
Page 41 - Mr. ET Newton a list of the mammals) from the forest-bed ; lists of the shells from the middle-glacial sands are added. 1890. Farrar, A. A Remnant of Pre-glacial England; or Holiday Notes on the Cromer Forest-bed. Trans. Leeds Geol. Assoc., pt. 5, pp. 41-45. The author describes Cromer as "a small old-fashioned town or large village, clustered about a church with a lofty tower, and situated on a low cliff, to whose face the seaward part precariously clings ; on each side higher cliffs curving...

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