The Collaborative International Dictionary of English v.0.48:

Surface \Sur"face\, v. t. [imp. & p. p. Surfaced; p. pr. & vb.
   n. Surfacing.]
   1. To give a surface to; especially, to cause to have a
      smooth or plain surface; to make smooth or plain.
      [1913 Webster]

   2. To work over the surface or soil of, as ground, in hunting
      for gold.
      [1913 Webster]

WordNet (r) 3.0 (2006):

surfacing
    n 1: emerging to the surface and becoming apparent

Moby Thesaurus II by Grady Ward, 1.0:

39 Moby Thesaurus words for "surfacing":
   arising, breaking water, carpet, coming, cover, crash dive, deck,
   discharge, dive, earth, emanating, emanation, emanative, emanent,
   emergence, emergent, emerging, emersion, emission, extrusion,
   floor, floor covering, flooring, forthcoming, ground, issuance,
   issue, issuing, parquet, pave, pavement, paving, running dive,
   stationary dive, submergence, terra firma, transeunt, transient,
   vent