UNION COUNTY. — 325 
streams all join the main streams from the same direction, but in Union 
county streams enter the main valleys from opposite sides. The surface 
between the streams is flat, and there is no evidence of a thickening of 
the Drift, except between Big Darby and Mill creeks. The Big Darby is 
the largest stream of the county. 
SURFACE FEATURES. 
Between Big Darby and Mill creeks there is a very noticeable thicken- 
ing of the Drift. It rises into long ridges and high knolls, which consist 
of hard-pan or glacier Drift. Northern bowlders and stones are on the 
surface and in the soil indiscriminately, though the same is true to some 
extent throughout the county. This ridge of Drift is greatly developed 
at New California, where wells are sunk to the depth of fifty-four feet 
without meeting anything but “blue clay,” the water obtained being 
bitter. West and south of Marysville two or three miles, the surface 
is high and rolling, with clay hills. ‘Toward the north and east it is flat, 
with gravel near the surface in some places. Between Milford Center 
and Unionville “clay knobs” and rolling land can be seen north of Darby 
Creek, while toward the south and in Union township the “ Darby plains” 
extend several miles. Wells at Pottersburg penetrate the Drift over 
sixty feet without meeting the rock, but obtain good water at that depth. 
About Newton there is a very rolling and bluffy tract of land, some of 
the wells obtaining bitter water in “blue clay” at fifty-two feet. This 
rolling strip of clay knobs dies out toward the south and west, and 
toward the north and east. Throughout the rest of the county the sur- 
face is very nearly flat, wells being usually less than twenty-five feet. 
‘This belt of clay knobs crosses the entire county, although it seems to 
turn a little toward the north in Jerome township. 
The following elevations above Lake Erie are taken from profiles of 
railroads that cross the county : 
J RK OLANWVOO sob cence abecodesas CECE OTERO CS SMCS ore ee oe ern oe st nim nn rE SOO mnt: 
IBSROBIOINUEINY' dbobo5 coerce an Godt HBOS HE SOO MUG COR CORE Ce DERE REE HUE MnP PMI BES ar tear 422 ‘ 
CO apne eee lis seth saan Wevednes siete vsti decus ddcdouvens's ccpasteeuaeecene ss 
Miciiy sivillll Crammemremencmansits meee es seca eva la Manon. Geran Wee coe cca estan Seee tie eaten 425 ** 
IM GUBTOTRO LoGedon adoqoocs Sooee Yee Osea ENS Ne valek calves antag: aitnuaee ty Mamatteun se 
The following points of elevation were obtained by aneroid barometer, 
connecting with railroad stations: 
