416 GEOLOGY OF OHIO. 



Maumee, or in situations where the surface drainage has carried the 

 black soil into the valleys. In the vicinity of the Belmore Ridge it con- 

 stitutes a very fine, sandy loam. There are also a few patches of fine, 

 yellow, lacustrine sand, which form a very light and easily exhaustible 

 soil. 



The following varieties of trees are characteristic of the county : 



Quercus alba — White Oak ; L. 



Fagus ferruginea— Beech Ait. 



Ulmus Americana — Elm (pi. Clayt.) Willd. 



Quercus (?) — Chestnut-leaved Oak 



Platanus occidentalis — Sycamore L. 



Populus moniljfera— Cottonwood Ait. 



Fraxinus Americana— White Ash L. 



Quercus macrocarpa — Burr Oak Michx. 



Juglans nigra — Black Walnut L. 



Juglans cinerea— Butternut L. 



Fraxinus sambucifolia — Blatek Ash Lam. 



Acer saccharinum — Sugar Maple Wang. 



Quercus rubra — Red Oak L. 



Acer rubrum— Soft Maple L. 



iEsculus glabra — Buckeye Willd. 



Tilia Americana — Basswood L. 



Asimina triloba — Pawpaw Dunal. 



Populus tremuloides — Trembling Aspen Michx. 



Salix nigra — Willow Marsh. 



Gymnocladus Canadensis — Kentucky Coffee Tree Lam. 



Prunus serotina — Black Cherry Ehr. 



Quercus palustris — Pin Oak DuRoi. 



Morus (?) — Mulberry 



Prunus (?)— Wild Plum 



Euonymus atropurpureus — Wahoo Jacqs. 



Carya alba— Shagbark Hickory Nutt. 



Viburnum opulus — Highbush Cranberry L. 



Fraxinus quadrangulata — Blue Ash Michx. 



Gleditschia triacanthos — Honey Locust ,. L. 



GEOLOGICAL STRUCTURE. 



The details of the geology of Henry county are not well known. The 

 rock exposures are confined to the bed and banks of the Maumee. It is 

 only known that the formations of the Devonian make their way across 

 the county from the north-east to the south-west, the south-eastern por- 

 tion being taken up with the Waterlime. The exposures that occur in 

 the Maumee are of the black slate or of the Hamilton, and are sufficient 

 to fix pretty certainly the points of crossing of the strikes of those forma- 



