Where can we find Igneous, Sedimentary, and Metamorphic rocks in NYS?

The Bedrock Geology Map on page 3 of the ESRT divides NYS into different regions based on the type of rocks that can be found in that area.

Each pattern in the shown on the map corresponds to rocks that formed in a different time period, and each pattern is made up from different rocks.  

EXAMPLE:

If we want to know what type of rocks could be found in Elmira NY, we first find it on the map.  You will notice that Emira falls in the dotted pattern.

 

Looking at the key in the bottom left hand corner we can find out when these rocks formed and what types of rocks are present.

The first piece of information next to the pattern is the Geologic Time Period when the rocks formed.  FOR NOW THIS INFORMATION IS UNNECESSARY!

What we care about is the next thing over written in italics.  The italicized text is a list of all of the rocks we can find in the area.

In Elmira we can find limestones, shales, sandstones, and conglomerate

 

Landscape Regions of NYS

We can also describe locations in NYS based on the landscape region they are in.  On page two of the ESRT we can find the Generalized Landscape Regions map (also shown above).  Here we see that New York state can be divided into large regions.

These regions are based on the bedrock geology.  This fact becomes clear when you look at the two maps side by side: 

NOTICE THAT THE SHAPES OF THE LANDSCAPE REGIONS MATCH UP WITH THE DIFFERENT TYPES OF BEDROCK SHOWN ON THE BEDROCK GEOLOGY MAP.

To find out what landscape region a city or location falls in, you must first locate it on the bedrock geology map.  Then flip to the Landscape region map and look in the exact same area. 

For example: 

  • Ithaca is located in the dot pattern area in the Southern part of NYS on the bedrock geology map.   
  • If we look at the same area on the Landscape Region map we see that Ithaca is located in the Allegheny Plateau Region.