Will LastAccessTime of a file can be less than LastWriteTime???

Hi Experts,
   The FileInfo Class has two properties "LastAccessTime" and "LastWriteTime". I'm confused between this two as I found that Lastaccesstime is lesser than Lastwritetime for files in my Machine(Server 2012). Is the Lastaccesstime should be the last time a user has opened it right, if so How can it be lessser than Lastwritetime?

   This is a output of a script shows filename, LastAccessTime, LastWriteTime and CreationTime.

Name           CreationTime       LastAccessTime         LastWriteTime           
----           ------------       --------------         -------------           
Report.txt  19-04-2013 10:54:10  19-04-2013 10:54:10    30-04-2013 10:54:10     
Users.txt   07-04-2013 11:07:13  07-04-2013 11:07:13    11-04-2013 13:22:47     
Host.txt    18-04-2013 16:36:51  18-04-2013 16:36:51    29-05-2013 18:18:04     
test.csv    18-04-2013 16:23:11  18-04-2013 16:23:11    06-05-2013 12:35:20     
test.txt    18-04-2013 16:34:47  18-04-2013 16:34:47    29-05-2013 18:12:52   


Please Help me under the difference LastAccessTime and LastWriteTime......

---

Thanks and Regards, Narayana Babu