Locally managed tablespaces + auto-allocate

I created this table in a locally managed (auto-allocate) tablespace:

create table testext ( c1 char (250)) storage (initial 10M next 10M) tablespace dimd;

When I query the extents:

select * from user_extents where segment_name = 'TESTEXT';

SEGMENT_NA PARTITION_ SEGMENT_TYPE TABLESPACE_NAME EXTENT_ID BYTES BLOCKS
---------- ---------- ------------------ --------------- --------- ---------

TESTEXT               TABLE              DIMD                    0   1048576
64
TESTEXT               TABLE              DIMD                    1   1048576
64
TESTEXT               TABLE              DIMD                    2   1048576
64
TESTEXT               TABLE              DIMD                    3   1048576
64
TESTEXT               TABLE              DIMD                    4   1048576
64
TESTEXT               TABLE              DIMD                    5   1048576
64
TESTEXT               TABLE              DIMD                    6   1048576
64
TESTEXT               TABLE              DIMD                    7   1048576
64
TESTEXT               TABLE              DIMD                    8   1048576
64
TESTEXT               TABLE              DIMD                    9   1048576

10 rows selected.    

WHY DOES IT HAVE TO SPLIT THE EXTENT TO MANY SMALL ONES? Received on Tue Oct 10 2000 - 12:16:44 CDT