K.L.
I'm definately not an expert, but it sounds like night terrors to me. My neice had this problem as well. Does your daughter have a "typical" time that she does this? My niece was a bit like clockwork as far as when she would wake and have these terrors, so they were instructed to wake her just before she would normally have one - just enough to know she is awake and put her back down. She would normally go right back to sleep and not have the night terror. I don't remember how long it took before the cycle was broken, but it did work for them. And the few minutes of being up as the parent definately beat the hour or so they were up previously.
GL.