Page:The American Cyclopædia (1879) Volume IV.djvu/744

728 {|align="center" cellpadding="0" cellspacing="0" rules="cols" style="font-size: smaller" minimum thickness. minimum thickness. minimum thickness.
 * align="center" colspan="11"|TABLE OF SEDIMENTARY STRATA, AND THE PLACE OF COAL AMONG THE ROCKS.
 * colspan="11"|
 * align="center"|English equivalents.
 * align="center"|Pennsylvania.
 * align="center"|Nomenclature.
 * align="center"|Maximum and
 * align="center"|Pennsylvania.
 * align="center"|Nomenclature.
 * align="center"|Maximum and
 * align="center"|New York.
 * align="center"|Missouri and Illinois.
 * align="center"|Maximum and
 * align="center"|Kansas and Colorado.
 * align="center"|Maximum and
 * align="center"|REMARKS.
 * rowspan="6"|
 * Drift, &c.
 * align="center"|?
 * rowspan="6"| Pennsylvania
 * rowspan="6"|Penn. and N. York
 * align="center"|?
 * Drift, &c.
 * align="center"|150
 * align="center"|?
 * Tertiary
 * Absent
 * align="center"|?
 * Tertiary, no coal
 * align="center"|200
 * Tertiary coal
 * Cretaceous
 * Absent
 * align="center"|?
 * Absent
 * align="center"|0
 * Cretaceous
 * Oölitic
 * Absent
 * Absent
 * Absent
 * align="center"|0
 * Oölitic
 * Triassic
 * Absent
 * Absent?
 * Absent
 * align="center"|0
 * Triassic
 * Permian
 * New red sandstone
 * New red sandstone
 * Absent?
 * align="center"|0
 * Permian
 * }
 * Absent
 * align="center"|0
 * Oölitic
 * Triassic
 * Absent
 * Absent?
 * Absent
 * align="center"|0
 * Triassic
 * Permian
 * New red sandstone
 * New red sandstone
 * Absent?
 * align="center"|0
 * Permian
 * }
 * Permian
 * }
 * }
 * }
 * }
 * }
 * }
 * }
 * }
 * }
 * }
 * }
 * }
 * }

250 to 1,500 250 to 1,000 ? 800 to 500 1,000 to 1,500

Containing lignite coal beds. Limestones and red sandstones. Richmond, Va., coal. Not investigated in the west. Containing gypsum, marls, &c., in Kansas and Colorado. Magnesian limestone.

PALÆOZOIC.

Carboniferous.

Coal measures Millstone grit Carboniferous limestones Sub-carboniferous

Coal measures Conglomerate Red shales White sandstones

XIII. XII. XI. X.

500 to 8,000 100 to 1,500 0 to 2,000 200 to 2,000

Absent Absent Absent Gray and white sandstones

Coal measures Millstone grit Carboniferous limestones

1,000 to 8,000 10 to 100 150 to 750

Concealed in Colorado by the tertiary. Occasionally seen in Colorado and Dakota.

Devonian

Old red sandstone. Eifel Eifel Ludlow

Red sandstones Limestones and shales Bituminous black slates Slates and sandstones

IX. VIII. VII. VI.

0 to 5,000 1,000 to 7,000 600 to 1,000 100 to 1,500

Catskill Chemung, Genesee, &c. Corniferous, Onondaga, &c. Oriskansy, sandtone, &c.

Bituminous slates, shales and limestones Oriskany

300 to 500 0 to 50

Not seen

?

Concealed or wanting in the far west.

U. Silurian

Wenlock Caradoc

Marls, shales and limestones Medina sandstones

V. IV.

1,000 to 4,000 200 to 2,500

Saliferous, Niagara, &c. Medina sandstone, &c.

300 to 700 ?

Not seen

?

Concealed by tertiary in Colorado.

Cambrian.

Bala rocks Festiniog group Lingula flags

Slates and limestones Limestones Slates and Potsdam sandstone

III. II. I.

500 to 2,500 1,000 to 6,000 1,000 to 4,000

Slates and limestones Limestones Calciferous Potsdam sandstone

Galena and magnesian limestones and calciferous sandstones Potsdam sandstone

300 to 1,000 100 to 250

Galena and magnesian limestone Potsdam sandstone

? 50 to 250

Occasionally seen in Colorado and Dakota, but generally concealed by the tertiary, &c.

Gneissic

Gneissic

5,000 to 10,000

Huronian gneissic

(Ozark) gneissic

500 to 1,000

(Rocky Mts.) gneissic

Metalliferous group of the Rocky mountains.