Editing Haverhill, Massachusetts (section)

===Geology===
The overall terrain within Haverhill is heavily influenced by various glacial formations. With drumlins, moraines, eskars, glacial erratics, and kettle ponds being common. Gravel mining operations are conducted along eskars and glacial deposites of readily accessible gravel.

Much of the soil within Haverhill is consolidated glacial till; inceptisols with moderate pedological development being the most common, as well as spodidols seen within the coniferous forests local to the area. Various fluvial deposits can be seen surrounding the river banks of the Merrimack and its tributaries.

The river systems within Haverhill have also been heavily altered by glacial activity, with drainage patterns being inconsistent and variable. Because of this inconsistency, and examples of each drainage pattern in some capacity being observable, streams and rivers within Haverhill would be classified as having a deranged drainage pattern.

Within close proximity of the Clinton-Newbury fault line, the bedrock topography of Haverhill is part of the Berwick Formation, consisting of metasandstone quartzite and sulfuric mica schists dating from the Silurian period. However other metamorphic rocks such as gneiss and shale are relatively common. Granite, feldspars, and other igneous silicates are also abundant.