118 ROMER’S DESCRIPTION OF THE CHALK 
quently clothes the sides of fissures; while the iron pyrites forms 
globular, racemose, spindle-shaped or very irregular masses, 
wholly inclosed in the chalk, 
In Germany the upper white chalk is one of the rarest forma- 
tions, and makes its appearance on the isle of Rugen and in New 
Pomerania: on the isle of Jasmund (near the fishing village of 
Sassnitz, as far as the estate Ranzow, further to the north) it 
forms perpendicular cliffs, which at the Stubbenkammer attain 
a height of 400 feet. This formation is likewise exposed to view 
at some detached points on the coast of the peninsula Wittow, 
of the island Hiddensen, and of Granitz in Rugen, as well as at 
several places in the interior of the island; for instance near 
Altencamp and Presche. In New Pomerania the localities are 
Quitzen, Gustebin, and Wassin, and Stengow on the island Wo- 
lin; with respect to these places, however, it is doubtful whether 
in some cases it may not be the lower white chalk which is ex- 
posed. 
2. Maestricht Limestone. [Maestricht kalk.] 
The hill of Petersberg near Maestricht, which is several hun- 
dred feet high, consists of a bright yellow, sandy, calcareous 
mass, in the lower portion of which are from ten to fifteen 
seams of black flints at a distance of about two feet from one 
another. The stone is generally friable and sometimes separates 
in great blocks; it is a very pure limestone, and contains, ac- 
cording to my analysis,— 
Clay/and:sand*. 6. ou) 6 See 
Oxide of iron (eisenoxyd) . . . 0°0025 
Aluming: si. 5) 5. 6 oe eae 
Carbonate oflime . .. . . . 0°9650 
Carbonate of magnesia . . . . 0°0100 
Water). 0. chile “s!) 80. Dee 
The lower layers gradually become whiter, but nevertheless 
retain their peculiar sandy texture, so that I could not find in 
the valley of the Meuse near Maestricht, even opposite to Visé, 
any stone which possessed the mineralogical character either of 
the upper or lower white chalk of England. 
This formation occurs with precisely similar characters at 
Falconberg (Fauquemont), at a short distance from Maestricht ; 
where, at the foot of the castle bearing the same name, are si- 
