Some examples of different genres. include comedy, tragedy, mystery and historical play. â¢ Audience: This is the group of people who watch the play. Many. playwrights and actors consider the. audience to be the most important element. of drama, as all of the effort put in to. writing and producing a play is for the.
Salinities less than 5ppt in the lower 40 miles of the Potomac River killed 50% of the marketable oysters after Agnes, and blocked reproduction that year. Because saltier water is heavier, the oysters near the surface suffered low-salinity water for a longer period of time.alinities less than 5ppt in the lower 40 miles of the Potomac River killed 50% of the marketable oysters after Agnes, and blocked reproduction that year. Because saltier water is heavier, the oysters near the surface suffered low-salinity water for a longer period of time.
The Potomac River basin study will focus on the freshwater part of the river upstream from Indian Head, Md. The average flow of the Potomac near Washington, D.C., is 7,440 million gallons per day for the period 1930-89.he Potomac River basin is underlain by many different types of rocks. The rocks in the mountainous Appalachian Plateaus and Valley and Ridge provinces are sedimentary (sandstones, shales, and limestones). The mountainous Blue Ridge and rolling Piedmont provinces are underlain mostly by crystalline rocks.