The phrase "a long log" is correct and usable in written English.
It can be used to describe a log that has considerable length, often in contexts related to nature, woodworking, or construction.
Example: "We found a long log by the riverbank that would be perfect for our campfire."
Alternatives: "an extended log" or "a lengthy log".
Dust with more flour and roll one portion into a long log, 1 cm wide.
Together, Carol and Max picked up a long log and ran at a nest that had survived intact, laying waste to it.
Roll up the dough (from a long side) into a long log and then cut into about 10 small lengths, each about 3in (7.5cm) long.
A long log of Dover sole under a sheet of bread crumbs had neither the texture nor the flavor that might justify charging $41 for a fish stick.
Along the long edge of one of the pieces, pile a third of the filling in a strip about 1cm wide, then roll the pastry and filling over to the opposite side, creating a long log.
Eight candidates, strangers to one another, with all insignia of rank removed and only numbered tags to identify them, were instructed to lift a long log from the ground and haul it to a wall about six feet high.
In the lobby, a long log-type bench resembles a hunk of driftwood.
"These are where the political prisoners lived when Stalin was building BAM," Anatoly Stepanovich, 69, told us, nodding toward a block of long log barracks lining the road above the station.
For example, a six foot long log should be at least six inches thick.
We stand back and watch as a long, thin log is strapped to a machine, and then cleaned before the moving blade is adjusted.
Set an "end time" as a calendar reminder, let your colleagues know (a little peer pressure goes a long way), log off email and — maybe best of all — change back into your "home" clothes to recreate the feeling that you're finally done for the day.
