Most M.D.'s recommend that it is best to wait until at least the 1st day of your missed period before you take a pregnancy test. [ Source: http://www.chacha.com/question/how-many-days-should-you-wait-after-a-missed-period-before-taking-a-pregnancy-test ].
It is typically found conformally overlying the Marcellus Formation, and underlying the Tully Limestone (where present). The Mahantango has been divided into four members: 1  Tully Limestone: a fossiliferous calcaerous shale. 2  The Tully is a conspicuous formation, which separates the Mahantango from the Hamilton Group.3  Sherman Ridge: Olive gray, fossiliferous, claystone and siltstone with interbedded fine sandstones coarsening upward.t is named for the North branch of the Mahantango Creek in Perry and Juniata counties in Pennsylvania. It is a member of the Hamilton Group, along with the underlying the Marcellus Formation Shale.
On the other hand, it is very common for a shallow water table to be present where glacial till or other fine-grained sediments are at the land surface, because they typically are poorly permeable and retard downward movement of water into underlying aquifers.his valley aquifer system is the preeminent source of water for the greater Indianapolis area and supports the preponderance of manufacturing, energy-generation, and other water-intensive activities in the valley. Other aquifers and aquifer systems are also present at greater depth below the shallow aquifer system.