any reason behind it?
The reason is not known.
Principal photography
By the end of the month, Corman had left the project and been replaced by Phil Karlson. Columbia gave no reason for this decision. 
when was kingdom of the crystal skull filmed 2008 what is its genre? UNANSWERABLE what is the significance of the crystal skull in the film? It was believed that it belonged to an alien life form and holds great psychic power, and finding more skulls will grant the Soviet Union the ability to rule the world through the use of telepathy. who played the role of jones? Harrison Ford. how is he related to aviation? He is a licensed pilot of both fixed-wing aircraft and helicopters. was he into archaeological expeditions as well? Yes, he serves as a General Trustee on the Governing Board of the Archaeological Institute of America. what opinions does he hold on politics? He holds the opinion of being a Democrat. any other famous movie he acted? "A Time for Killing" who was his co- star in this film regarding killing? "Glenn Ford" and "George Hamilton" what is the storyline of this film? It revolves during the Civil War period, Confederate soldiers escape from a Union prison and head for the Mexican border. Along the way, they kill a Union courier bearing the news that the war is over. Keeping the message a secret, the captain has his men go on and they soon find themselves in a battle with the Union search party who also is unaware of the war's end. where was the filming done? Columbia who directed it? The direction was initially by Roger Corman but was finished by Phil Karlson.
UNANSWERABLE He decided I was going nowhere and wanted to move directly into the business." So he accepted a contract with Columbia. He had a deal to make three films with Columbia. Richard Devon, an actor who had worked with Corman, later argued the problem on the film was that Corman could not reconcile his low budget ways to work for a major studio.
A Time for Killing A Time for Killing
Pre-production Principal photography
By the end of 1964, Roger Corman was one of the most successful low-budget filmmakers in Hollywood, mostly working for American International Pictures. "Everything had been interesting, artistically satisfying, economically satisfying", Corman said eighteen months later. "But I decided I was going nowhere and wanted to move directly into the business." So he accepted a contract with Columbia.

Corman had a deal to make three films with Columbia. "But every idea I submitted was too strange, too weird", he later said. "Every idea they had seemed to ordinary to me. Ordinary pictures don't make money today [in 1966] because audiences today are too intelligent... It's a young people's audience... They can see the average for free on TV. You've got to give them something a little more complex artistically and intellectually. To show something you can't see on TV leads inevitably to unusual material." Richard Devon, an actor who had worked with Corman, later argued the problem on the film was that Corman could not reconcile his low budget ways to work for a major studio.
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A Time for Killing [SEP] Principal photography
Filming started in June 1966 in Kanab, Utah. By the end of the month, Corman had left the project and been replaced by Phil Karlson. Columbia gave no reason for this decision. Once Corman left, his editor Monte Hellman also left the project. Richard Devon, an actor who had worked with Corman, later argued the problem on the film was that Corman could not reconcile his low budget ways to work for a major studio. He was given a fine budget and stars and everything else. But he started shooting the film and he just couldn't get out of his old ways.