A fall line (or fall zone) is a geomorphologic unconformity (e.g., monoclinal faulting or flexing) between an upland region of relatively hard crystalline basement rock and a coastal plain of softer sedimentary rock. A fall line is typically prominent when crossed by a river, for there will often be rapids or waterfalls. Many times a fall line will recede upstream as the river cuts out the uphill dense material, often forming “c”-shaped waterfalls. Because of these features riverboats typically cannot travel any farther inland without portaging, unless locks are built there. On the other hand, the rapid change in elevation of the water, and the resulting energy release, makes the fall line a good location for water mills, grist mills, and sawmills. Because of the need for a river port leading to the ocean, and a ready supply of water power, settlements often develop where rivers cross a fall line.

The slope of fall zones on rivers played a role in settlement patterns. For example, fall lines proved useful for hydroelectric dams such as at Rochester, New York (on the Niagara Escarpment) and Columbia, South Carolina (on the Atlantic Seaboard fall line). Other cities along fall lines of the United States include:

Matthew Albert Costa (born June 16, 1982) is a singer-songwriter from Huntington Beach, California. He has five independent releases: two self-recorded EPs, and three full-length CDs released via Brushfire Records.

Matt Costa, who is of Portuguese descent, states that his father worked in the airline business. In early 2003, Matt's homemade demo reached No Doubt guitarist Tom Dumont, who offered to record more demos for Costa in his home studio. Those first recordings led to two EPs that Costa and Dumont distributed themselves. These were later combined and mixed by Phil Ek in order to form Costa's first full-length CD entitled Songs We Sing.

Costa spent the summer of 2005 opening on Jack Johnson's summer tour. He has since toured with Modest Mouse, Oasis, Ryan Adams & The Cardinals, G. Love & Special Sauce, and Death Cab for Cutie. Costa joined Jack Johnson for his 2006 European tour. He has also contributed to the Jack Johnson and Friends Curious George soundtrack; his track is entitled "Lullaby". This song was taken from his The Elasmosaurus EP. Costa has also toured extensively in Australia, New Zealand, Europe, Asia and South America.

The Greek is a fictional character on the HBO drama The Wire, played by actor Bill Raymond. The Greek is the head of an international criminal organization involved in narcotics and human trafficking. The Greek is a mysterious figure involved in numerous criminal activities. His given name is never mentioned on the show, and though he is known only as "The Greek", he has stated (in the episode Port in a Storm) that he is not actually Greek. A quiet and unassuming man, the Greek prefers to keep a low profile, operating all of his business through his lieutenant Spiros "Vondas" Vondopoulos. His smuggling organization operated from a small diner in Baltimore for years, and while Vondas would conduct business the Greek would listen in quietly at the counter. Nick Sobotka, upon seeing the Greek identify himself, was amazed that the shadowy figure had been in plain sight the entire time.

Despite his calm appearance, the Greek is cunning and ruthless, and only interested in facts that make him more money. Series creator David Simon has said that The Greek is an embodiment of raw unencumbered capitalism. Anyone interfering in this process is eliminated immediately, and he prefers to leave victims headless and handless to hinder identification.