New Technology Key to Exploiting Brown Dense Formation by Luke Jones Posted 9/10/2012 12:00 am Updated 3 years ago South Arkansas is no stranger to oil development. El Dorado was born out of the business, but it's been a long time since oil has brought real prosperity to the region. Want the Full Article? Get Unlimited Archive Access for $19.95 per Year Readers must pay to access stories older than 20 days. Purchase Now Already have archive access? Login to view this article.