@@ 16,6 16,31 @@ 
     problem, because ranges are always subregions of allocations, and so by
     definition will never cross block alignments greater than the parent region.
 
+    logregions are also valid addresses for a pointerless binary tree, where
+    the ordering matches that of a sorted array:
+
+    ----------------
+    --------0-------
+    ----1-------1---
+    --2---2---2---2-
+    -3-3-3-3-3-3-3-3
+    -323132303231323
+
+    increasing the depth of an array addressed by logregions:
+
+    a.) at bottom
+
+        shift right & space apart by 1 element
+            -323132303231323 -> -4342434143424340434243414342434
+                                  - - - - - - - - - - - - - - -
+
+    b.) at top (e.g. as in a merkle tree expansion)
+
+        append new right hand side
+            -434243414342434 -> -4342434143424340434243414342434
+                                 ---------------
+
+
 """"round x to the next highest power of 2
 inline... alignsizeu (x : u32)
     x := x - 1