116 Baden Powell— Igneous Rocks of Charnwood Forest. 



the point of commencement of the intermediate region, we have a 

 locality marked in the Survey as one of feldspathic porphyry, at the 

 summit of Black-hill, which offers a peculiar appearance, different 

 from others similarly designated. 



These all retain externally, at least at their upper parts, the usual 

 jagged and split character of the slate, however altered and fused 

 below. But Black-hill presents a very different appearance. To a 

 casual observer the top of this hill (covered by a plantation) might 

 seem merely over-spread with a collection of blocks ; they are mostly 

 of that comparatively smooth appearance, with partially rounded 

 edges, which is totally different from the jagged structure of the 

 slate. When more carefully examined most of these blocks are found 

 to be deeply imbedded, and, in some instances, closely aggregated 

 together. This seems allowed to constitute the evidence of their 

 being a true porphyritic rock in situ. 



Intermediate region. — Eecurring now to the region before men- 

 tioned, intermediate between the opposing dips, the first igneous 

 locality which claims our notice is the hill on which is situated the 

 farm called Bawdon, or Baldwin, Castle, which is marked in the 

 Survey as syenite at the top, surrounded by slate, and on one side by 

 the New Eed marl. 



On the body of the hill no rock whatever is visible ; the whole 

 surface being under cultivation, and covered apparently with the New 

 Ked marl, as most of the lower hills are. 



In two fields, just below the summit, a few corners of rock project 

 through the turf, and there are many scattered blocks. 



Bawdon Castle. — At the summit, in the midst of that one of the 

 two plantations nearest the farm, thickly overgrowTi with under- 

 wood, which renders it not easy to find, is a small knoll or mass of 

 rock, consisting mainly of large pieces irregularly piled up. The 

 specimens are so closely grained and compact as to resemble green- 

 stone much more than syenite ; as is the case also with some of the 

 portions just below, before mentioned. Among these, however, and 

 among the blocks, I found several specimens of the usual type of 

 pink syenite, as well as others less marked, and approaching more 

 nearly to the former character. In the museum of the Survey there 

 is a specimen marked, '^ Greenstone from Bawden-hill," which, I 

 presume, is from this locality. But, throughout the district, the 

 names are most variously spelt and pronounced. 



Line of Igneous action. — The most marked feature in the inter- 

 mediate region, is the occurrence of several points of igneous action 

 on the tops of the hills called Green-hill, Bencliff, and Old John, all 

 lying in a straight line with each other, and with Black-hill, and 

 parallel to the axis. 



Out of this line, at a point near the S.W. base of Bencliff-hill, I 

 have noticed another locality, not marked in the Survey, where there 

 appears a mass of porphyritic rock, which seems to approach closely 

 towards syenite in character, in a plantation by the side of the road, 

 near the foot of the hill leading up from the Ulverscroft valley. 



Old John-hill— On the hill called Old John, one part is marked 



