Texture is clay. The Bss horizon has hue of 10YR or 2.5Y, moist value of 4 or 5, and chroma of 3 through 6. Texture is clay. The Santa Isabel series is the only known series in the same family. Santa Isabel soils are on similar positions but are not calcareous in any part.
Fraternidad soils are on coastal plains.
They formed in clayey sediments derived from volcanic rocks and limestone. The climate is tropical semiarid. Slopes range from 0 to 12 percent. The average annual temperature ranges from 76 to 78 degrees F., and the average annual precipitation ranges from 30 to 35 inches. Aguirre , Cartagena , Fe , Guanica , and Paso Seco soils.