This quiz covers some of the main things you should know about the Edwards, so that soon you will be ready for the Edwards Grand Master exam.
An ____________ is a geologic formation that will yield water to a well in sufficient quantities to make the production of water from this formation feasible for beneficial use.
The Edwards Aquifer is an arch-shaped belt of porous, water bearing limestones composed of the Comanche Peak, Edwards, and Georgetown formations trending from west to east to northeast through Kinney, Uvalde, Medina, Bexar, Comal, Hays, Travis, and Williamson counties.
Edwards limestones are from the geologic period called the late ____________, which ended about 65 million years ago.
The three major zones of the Edwards Aquifer are:
a) Flow Zone, Upper Zone, Lower Zone
b) Happy Zone, In The Zone, Zoned Out Zone
c) Contributing Zone, Recharge Zone, Artesian Zone
Water that enters the Edwards through faults, fractures, or direct absorption is called recharge.
The Edwards outcrop, where the Edwards and associated limestone formations are found at the surface, is also called the ____________ Zone.
The Edwards limestone can transmit water over long distances because it has holes that are connected. In other words, it is both ____________ (has holes) and permeable (the holes are connected).
The Edwards Plateau, also called the Texas Hill Country, is about 5,400 square miles and elevations range between 1,000 and 2,300 feet above sea level. Water collects in rivers and creeks that run across the Recharge Zone, where they contribute their flow to Edwards recharge. This area is called the ____________ Zone.
d) Cedar Tree
Edwards Aquifer limestones are between 300 - 700 feet thick.
A cavern is a large underground opening in rock (usually limestone) which occurred when some of the rock was dissolved by water. There are many of these in the Edwards.