The principal ones, Willonghby Eun and Eock Creek, pursue a parallel
course from north to south, one west and the other east of Gettysburg,
emptying themBelvea lower down into Marsh Creek. The banks of
these two resemble each other. Covered with woods, those of Rock
Ovek ezeiapUfy its name, and are covered with rocks which rise aa




high as one hnndTed aud twenty and even one hundred and Gftjr feet
•twTe its bed. Those of Wlllonghbr Bon are not so high nor so steep,
and are leas wooded. The hattJe-fleld ia comprised between the right
haiik of Bock Cieek aad the left bank of Willonghby Knn.
The hills that are met npon the ground ia between may be divided
into two groapa, disposed in analogous fashion, whose formation reveals
tbo geological law common to the whole legion. Each group forms a
oombinstJon of three ridges, Btarting flx>m a common point, alike in
elevation and abmptnesB. The cenlial lidg^ Uv% \n^a(9^ uiAXisu^b^,



34



follows a sontherly directioii ; another, equally straight bnt less elevated,
south-southwestward ; the third, extending east-southeastward, is short
and split into two sections, as if, by the general direction in the upheav-
ing of the ground, it had been thwarted in its formation. The starting-
point of the first group is a ridge situated one and a quarter miles
northwest of Gettysburg, in the direction of Mummasburg. It was
originally called Oak Kidge or Oak Hill, on account of a thick forest
of oaks that covered it. It is perhaps better known as Seminary Hill

or Seminary Ridge, from the fact
that a Lutheran seminary is
located upon the apex of the
ridge. Following the most popu-
lar title, it will be referred to in
these pages as Seminary Ridge.
