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4th Scattered in loose masses all over the sur


4th In numerous fragments.
4th In considerable masses.

In loose masses on surface.

41h And in other parts of township.
4ih In many places abundant.

And on many other sections.
41h Abundant in many places.
4th In loose masses on the surface.



And in several other sections
4th Strewed all over the township.
4th On nearly every section,
41h Occasionally in loose masses.

Crystallized, abundant and important
4th Have been quite productive.
4th Large quantities scattered throughout the

4th On east side of township frequeni.
4th In sınall pieces.
4th In small pieces, frequent.

4th In small pieces.
4th Loose masses on every quarter section.
41h | Large quantities in loose masses, and e-
casionally all over township.

Do. 41h Large quantities on every section; one

vein 3 or 4 feet wide in inck.
4th Very frequent, in small pieces.
4th Abundant all over township.
4th In some places ground lierally covered

with spall pieces.
4th Occasionally.
41h In numerous Icose pieces.
41h In small pieces.

4th | Sinall masses abundant all over township | 4th | In loose masses.

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No. IV.

Catalogue of the different varieties of geological and mineralogical spes.

cimens collected in Iowa, Wiskonsin, and Illinois.

[The numbers here given correspond with those on the labels which are attached to the spe cimens themselves, of which a collection has been made to form a nucleus of a national cabinet.]

No. 1. The upper stratum of the cliff limestone.
No. 2. Slaty clay of the coal formation.
No. 3. Magnesian limestone, (the cliff rock as it most generally occurs.).
No. 4. Similar to No. 3, but of a deeper yellow color.

No. 5. Similar to No. 3, but full of little cavities, which often contain columns of crinoidea, an ancient order of marine animals, popularly called stone lilies, belonging to the tribe of fossil radiated animals, or zoophites, (animal planıs.)

No. 6. Compact carbonate of lime, with crystallized carbonate of lime disseminated.

No. 7. One of the upper members of the cliff limestone, as it occurs in the southern part of the Dubuque district, with cavities containing carbonate of lime.

No. 8. Hard white carbonate of lime, containing crystallized carbonate of lime.

No. 9. Resembling No. 3, but of a red tint, and embedding fossil shells; one of the upper members of the cliff limestone in the southern part of tho Dubuque district.

No. 10. White limestone in very regular layers, such as occurs above the cliff limestone on the Mississippi, near Parkhurst.

No. 11. Fine grained and soft stratum of the cliff limestone.

No. 12. A stratum of the cliff limestone, containing a variety of fossils resembling the rock of South Union, Ohio.

No. 13. Chert, containing columns of crinoïdeå.

No. 14. Limestone in the southern part of the Dubuque district, containing orthoceratites, (a many.chambered fossil marine shell,) cerebratulæ, and other bivalve shells.

No. 15. Hydrated brown oxide of iron.

No. 16. Boulders, detached and worn masses of transported granite, and other crystalline rocks.

No. 17. A fossil coralline—the lithodendron of Goldfuss; the caryophyllia of Lamarck; the stylina of Parkinson.-(See illustration of No. 25.)

No. 18. Ferruginous sandstone.

No. 19. Compact limestone at the margin of the great coal-field, containing stylina.

No. 20. Magnetic houlders having polarity.

No. 21. A striped rock -a straturn in the cliff formation resembling the building rock helow Madiso!, Indiana.

No. 22. A brecciated carbonate of lime—a limestone made up of angular fragments at the margin of the great coal-tield.

No. 23. Saudstose of the coal formation.
No. 24. Limestone containing trilobites. (See description of No. 106.)
No. 25. Similar to No. 17. The lowa City marble.—(See sketch No. 11.)
No. 26. A stratum of the cliff limestone, with glistening crystalline facets

of carbonate of lime disseminated, resembling the cliff limestone of Adams county, Ohio.

No. 27. A hydrate of silicia, containing a small percentage of alumina; similar to the rock which forms the white banks below Cape Girardeau, on the Mississippi-a very white, crumbling variety of chert. · No. 28. The cast of several species of complicated bivalve fossil shells belonging to the genus terebratulamin shape, frequently resembling pigst seet.-(See sketch No. 5.)

No. 29. Several species of fossil coralline called the chain coral (ca pora.)-(See sketch No. 6.)

No. 30. Sandstone, with vegetable impressions.
No. 31. Carbonate of lime, crystallized in obtuse rhombohedrons.
No. 32. A fossil coralline, resembling the calamopora spongites.
No. 33. A many chambered fossil shell, resembling a lituus of Breyn.
No. 34. Sulphuret of lead, (galena.)
No. 35. Magnetic boulders.
No. 36. Sialactite.
No. 37. Stalagmite.
No. 38. Cap, rock or "rider” closing over the fissures containing lead ore.

No. 39. Brecciated cap rock.
: No. 40. Black clay, taken from Hunt's diggings.

No. 41. Red sand, containing oxide of iron, from the same place. · No. 42. Brown clay, from the same place.

No. 43. Nodular magnesian limestone.

No. 44. A gray stralum in the cliff limestone, containing numerous minute fossil shells.

No. 45. Coal shale.
No. 46. Indurated slaty clay, found near Belleview.
No. 47. Bituminous coal.
No. 48. Sulphuret of iron.
No. 49. Sulphuret of iron, with vegetable impressions.

No. 50. Gray stratified limestone, containing a bivalve shell, belonging to the genus strophomena. (See illustration of No. 59.)

No. 51. Fossil coralline; called the tupipora.

No. 52. A spiral univalve, resembling a trochus. : No. 53. The cast of a long, spiral, fossil shell.

No. 54. A fossil coralline, belonging to the genus calamopora.

No. 55. A complicated bivalve shell, belonging to the genus spirifer, or delphyris.

No. 56. A straight many.chambered fossil shell, belonging to the ancient -genus orthoccratites.

No. 57. A complicated fossil bivalve shell, belonging to the genus terebratula.

No. 58. A fossil bivalve shell, similar to the last, without a perforation at the beak ; similar to the orthis.

No. 59. A fossil bivalve shell, very much compressed, one valve concave, the other convex, hinge straighi, no perforation ; belonging to the ancient genus strophomeno.-(See sketch No. 7.) | No. 60. A toothlike fossil, called the dentalium.

No. 61. A flat fossil shell, something like a lamillaria, (probably new.)
No. 62. A compressed spiral univalve, resembling a citrus.
No. 63. A fossil coralline ; (the columnaria.)
No. 64, A fossil zoophyte, belonging to the genus astrea.

No. 65. A black slate.

No. 66. Entrochites; joints of a fossil marine radiated animal, belonging to the order crinoidea, popularly called stone lilies.

No. 67. A fossil coralline, belonging to the genus coscinopora. (See sketch No. 10.)

No. 68. Chert—a variety of flint.

No. 68'. Chert, associated with the Missouri limestone on the Wiskonsin river.

No. 69. Flint.
No. 70. Chalcedony.
No. 71. Carnelian.

No. 72. Agate.
? No. 73. A coralline, belonging to the genus cyathophyllum.

No. 74. Quartz.

No. 75. Bog iron ore.
3. No. 76. Argillaceons iron ore.

No. 77. Water limestone (an argillaceous limestone.)
No. 78. Magnetic iron (found only in boulders.)
No. 79. A light gray compact building rock.

No. 80. The cliff limestone, as it is found in the walls of the lead-bearing fissures.

No. 81. Part of a many-chambered marine fossil shell, resembling a . belemnite, but probably the termination of certain orthoceratites, found in a stratum, six inches thick at Eagle point, fifteen feet above low water, on the Mississippi ; the stratum containing numerous strophomena immedi. ately below this stratum.

No. 82. A blue or gray fossilliferous limestone, below No. 79. .
No. 83. A bivalve fossil shell, resembling the genus venus.

No. 84. Brown magnesian limestone, containing casts of bivalve fossil shells.

No. 85. Stratum of blue limestone, containing a long spiral univalve fossil shell.

No. 86. Indurated shale, or slaty bituminous clay.

No. 87. Stratum in the cliff formation, of a slaty structure, and brownish yellow color.

No. 88. Stratum in the cliff formation, of a bluish gray color. · No. 89. Caryophyllum-a fossil coralline.

No. 90. Stratum of the cliff formation, affording a fine building mate. rial-a magnesian limestone.

No. 91. Stratum of blue or gray limestone, below No. 81.
No. 92. Turbinolia, a fossil coralline.

No. 93. White crystalline limestone, from the western part of the Dubuque district.

No. 94. A fossil coralline, resembling stylina, (probably new.)
No. 95. A fossil coralline, resembling astrea, (probably new.)

No. 96. Calamopora basaltica. .
· No. 97. A fossil coralline, (probably new.)

No. 98. The upper sandstone in the townships ranging near the Wiskonsin river, and north of Turkey river, below the buff colored rock; of various colors—white, yellow, red, and sometimes variegated with stripes of white, yellow, and red. (See diagrım No. 6.)

No. 98'. Lower sandstone, just above the water level at Prairie du Chien; often very soft and crumbling. (See diagram No. 6.)

No. 99. Argillaceous limestone.

No. 100. Oölitic chert, a stratum in the equivalent of the Missouri limestone on the Wiskonsin river.

No. 101. Conglomerate sandstone.
No. 102. Buff colored stratum, above No. 98.

No. 103. Blue limestone, (see diagrams Nos. 4, 5, 6,) containing stró phomena. (See illustrations of No. 59.)

No. 104. Stratified white carbonate of lime, containing a spiral univalve, resembling a trochus, a stratum in the blue limestone.

No. 105. A yellow rock with fossils, on Turkey river, perhaps the equivalent of No. 102.

No. 106. A fossil crustaceous animal, having a three-lobed structure.
No. 107. A red rock, with fossil impressions.

No. 108. A magnesian limestone, below No. 98; is an equivalent of the Missouri limestone. (See diagram No.6.) This rock is also numbered 3.

No. 109. Similar to No. 108, from the same geological position.

No. 110. Wiskonsin copper ore, (a hydrous di-carbonate of the oxide of copper, with a variable admixture of oxide of iron, and sometimes a little sulphuret of copper.)

No. 111. Stratum in the Missouri limestone.

No. 112. Building stratum in the equivalent of the Missouri limestone, just above the lower sandstone, No. 98'.

No. 113. A stratum in the equivalent of the Missouri limestone.

No. 114. A porphyritic boulder. : No. 115. Boulder of siliceous slate.

No. 116. Very rugged masses of quartz found with No. 108, similar to those found in the lead region of Missouri.

No. 117. Boulder of hornblende.
No. 118. Ferruginous sandstone, below the blue limestone formation,
No. 119. The stratum No. 98, passing into a quartz rock.

No. 120. Argillaceous limestone—a stratum in the blue limestone formation, similar to ihat used in Cincinnati for curbstones.

No. 121. Carbonate of lead.
No. 122. Sulphuret of zinc, (black.jack.)
No. 123. Carbonate of zinc, (dry bones of the Wiskonsin miner.)
No. 124. Hornstone.
No. 125. Gray clay froin the diggings.
No. 126. Lowest stratum of the cliff limestone, above the blue limestone.
No. 127. Calcareous tufa, (a deposite from lime water.)
No. 128. Marl, associated with No. 82.
No. 129. Chert, containing strophomena.

No. 130. One of the lower beds of the blue limestone, containing numerous small shells and eyathophylla.

No. 131. Sulphate of barytes, from Mineral Point and Gratiot's Grove diggings.

No. 132. Lowest rock on Rock Island ; four feet exposed above low water of the Mississippi.

No. 133. A shelly white carbonate of lime, above No. 132, twelve or fif. teen feet thick.

No. 134. Bröcciated limestone, above No. 133, one foot thick.
No. 135. Similar to No. 133.

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