Another salient feature of this delta is that it has low salinity levels when compared to other bays in the Texas region. This is because there is a great volume of water in the Guadalupe river and the adjacent bays where it empties itself is shallow. This makes it more like a freshwater delta than a saline one.

The low-salinity levels helps the growth of unique fishes that are very different from what can be seen in the other delta regions of Texas. Some endangered species found here include Malaclemys terrapin littoralis, Texas diamondback terrapin, whopping crane, white-tailed hawk and...

However, there is very little plant life in these marshes because they are in a semi-arid climate that makes it difficult for plants to grow. Instead, there are numerous different kinds of facies or sedimentary deposits that is found in different parts of this delta. These marsh sediments also have an organic-rich clay, but no peat deposits or coal has been found.
In short, the book gives a great description of the Guadalupe delta, right from its formations to its different subdelta, marshes, bayous, flora and fauna. It is a wonderful source of knowledge about this young delta in Texas.