1 / 7

October 19, 2011

October 19, 2011. Objective: Learn how caves form and their features. Agenda: Ground water notes continued Water budget activity Amazing Caves. GROUND WATER - Aquifer. WATER INFILTRATES STOPS AT IMPERMEABLE LAYER

jud
Télécharger la présentation

October 19, 2011

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. October 19, 2011

  2. Objective: • Learn how caves form and their features • Agenda: • Ground water notes continued • Water budget activity • Amazing Caves

  3. GROUND WATER - Aquifer • WATER INFILTRATES • STOPS AT IMPERMEABLE LAYER • RISES FROM BOTTOM UP – (LIKE FILLING A BATH TUB) THIS IS CALLED GROUNDWATER or SATURATED ZONE or AQUIFER • TOP OF SATURATED ZONE IS THE WATER TABLE

  4. WATER TABLE RISES WITH RAINFALL FALLS WITH DROUGHT

  5. How caves form • Carbon dioxide from the air combines with precipitation to produce carbonic acid. • The acidic groundwater easily erodes the limestone to produce caves, caverns, sinkholes, and disappearing streams. • This type of topography is referred to as karst topography.

  6. Cave features • When the roof of a cavern collapses a sinkhole is produced. • The limestone and dolomite features that form on the ceiling of caverns as the rock precipitates out of the groundwater are called stalactites (c for ceiling). • The features that form on the ground of the cavern are called stalagmites (g for ground). • Sometimes a stalactite will join with a stalagmite to form a column.

  7. http://www.watersheds.org/earth/karstmovie.htm

More Related