The Southwestern Historical Quarterly, Volume 66, July 1962 - April, 1963 Page: 456

Fig. 3. A representation of the character and
approximate extent of changes in the flood-plain
valley of the Big Bend from 1921 to 1953-
Zip-a-tone areas currently exhibit the same
condition as does the formerly bare sand flat.
Both are dominated by Tamarix with which are
intermixed lesser numbers of Salix and Populus,
together with sedges, grasses, and other herba-
ceous plants common to such habitats.
Lines across the channel cutting off Goat Is-
land in 1921 indicate the current fusion of that
island with the mainland. This channel, current-
ly choked with Tamarix, is now difficult to dis-
tinguish on the ground. Whether the current is-
land (lat. 340-9'-34", long. 98-38'-05") is an
avulsive vestige or a new one has not been deter-
mined. The new secondary channel is approxi-
mately correctly located. A second such channel,
which lies against the southeastern bluff bank of
the island, connects with the first near its con-
fluence with the main channel downstream; but
where this second channel leaves the main chan-
nel was not determined.
The exact location of the current diagonal
main channel was not determined; but it passes
beyond the mapped vestigial island somewhat
eastward of its position in 1921.
The names of current landowners, who have
extended their boundary lines across Goat Island
and other areas in the flood plain, have been
placed on the map according to the position of
their property.

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Texas State Historical Association. The Southwestern Historical Quarterly, Volume 66, July 1962 - April, 1963, periodical, 1963; Austin, Texas. ( accessed July 24, 2017), University of North Texas Libraries, The Portal to Texas History,; crediting Texas State Historical Association.